No es necesario inventar una nueva fila de opciones de pantalla. Solo usa los metaboxes adecuados.

Actualmente, estás dibujando pseudo-metaboxes:

<!-- Post status start-->
        <div class = "postbox">
            <div class = "handlediv"> <br> </div>
            <h3 class = "hndle"><span><?php _e("By Post Status", 'bulk-delete'); ?></span></h3>
        <div class = "inside">
        <h4><?php _e("Select the posts which you want to delete", 'bulk-delete'); ?></h4>

Debes hacer esto:

<div id="post-body-content">
    <!-- #post-body-content -->
</div>

<div id="postbox-container-1" class="postbox-container">
    <?php do_meta_boxes('','side',$object); ?>
</div>

<div id="postbox-container-2" class="postbox-container">
    <?php do_meta_boxes('','normal',$object); ?>
    <?php do_meta_boxes('','advanced',$object); ?>
</div>

Luego, registra tus propios metaboxes con add_meta_box() .

Lea Meta Boxes en páginas personalizadas de Stephen Harris para obtener todos los detalles ( demostración en GitHub ).
El punto principal es: obtendrá las opciones de pantalla para estos cuadros de forma gratuita.

Y cuando WordPress cambia el marcado interno para metaboxes un día, es probable que su código aún funcione, porque ha usado la API.

Puedes hacerlo usando el filtro adecuado dentro de la clase \WP_Screen . Solo asegúrese de no activarlo en por defecto:

Cómo mostrar u ocultar la pestaña

El siguiente filtro muestra cómo mostrar u ocultar la pestaña. En realidad, como hay un filtro mejor, la siguiente forma es de mayor utilidad si necesita forzar ocultar la pestaña cuando ya existe:

add_filter( 'screen_options_show_screen', function( $show, \WP_Screen $screen )
{
    // Navigate to the screen of choice and uncomment the following line to find out the 'base' val
    // var_dump( $screen );
    return 'your_screen_id' !== $screen->base
        ? $show
        : true;
}, 10, 2 );

Cómo mostrar la pestaña y agregar contenido personalizado

A continuación se muestra una pestaña de configuración que contiene un campo de entrada que contiene el valor amount que podría usar de cualquier manera en su página (por ejemplo, para limitar los resultados de la consulta $wpdb ).

/**
 * @param string     $settings
 * @param \WP_Screen $screen
 */
add_filter( 'screen_settings', function( $settings, \WP_Screen $screen )
{
    if ( 'your_screen_id' !== $screen->base )
        return $settings;

    $amount = isset( $_GET['paged'] ) 
        ? filter_var(
            absint( $_GET['paged'] ),
            FILTER_SANITIZE_NUMBER_INT,
            FILTER_NULL_ON_FAILURE
        ) 
        : 1;

    return sprintf(
        '<label for="amount">Amount:</label> '
        .'<input step="1" min="1" max="999" class="screen-per-page" name="amount" val="%d">',
        .get_submit_button( 'Set', 'secondary', 'submit-amount', false ),
        $amount
    );
}, 10, 2 );

Aquí hay un ejemplo completo y conciso basado en el Meta cajas en páginas personalizadas por Stephen Harris :

Mismo código que un gist

<?php

/**
 * Plugin Name:     LHF Volunteer Form
 * Description:     Manages a google-sheet full of names and emails
 * Plugin URI:      http://ladehammerfestivalen.no/volunteer
 * Author URI:      http://genja.org
 * Author:          [email protected]
 * Text Domain:     lhf-volunteer-form
 * Domain Path:     /languages
 * Version:         0.2.0
 * @package         Lhf_Volunteer_Form
 */

require_once  __DIR__ . '/vendor/autoload.php';

use Lhf\Sheet\RegistrationsSheet;

frivilligSystemMain();

function frivilligSystemMain() {
    try {
        $regSheet = \Lhf\Sheet\RegistrationsSheet::createInWordPress();
    } catch (\Exception $ex) {
        error_log(sprintf('%s:%d %s', __FILE__, __LINE__, $ex->getMessage()));
    }
    add_action('init', function() use ($regSheet) {
        if (is_admin()) {
            add_action( 'admin_menu', function() use ($regSheet) {
                $screenId = DashboardView::screen_id;
                $pageId = add_dashboard_page( 'hammerater', 'Hammerater', 'endre_frivillig_skjema', $screenId,
                    function () use ($regSheet) { DashboardView::renderVolunteerDashboard($regSheet); } );
                add_action("load-$pageId", function() use ($regSheet, $pageId, $screenId) {
                    wp_enqueue_script('postbox');
                    add_screen_option('layout_columns', array('max' => 2, 'default' => 2) );
                    do_action("add_meta_boxes_$screenId", null); // allow third parties to hook into this.
                    do_action('add_meta_boxes', $screenId, null); // allow third parties to hook into this.
                });
                add_action("add_meta_boxes_$screenId", function () use ($regSheet) { DashboardView::registerMetaboxes($regSheet); });
            });
        }
    });
}

class DashboardView
{
    const screen_id = 'frivillig-liste';

    private static function includeAdminHeader()
    {
        require_once( ABSPATH . 'wp-admin/admin.php');
        require_once( ABSPATH . 'wp-admin/includes/dashboard.php');
        require_once( ABSPATH . 'wp-admin/admin-header.php');
        wp_dashboard_setup();
        wp_enqueue_script( 'dashboard' );
        add_thickbox();
        do_action( 'add_meta_boxes' );
        if ( wp_is_mobile() ) {
            wp_enqueue_script( 'jquery-touch-punch' );
            //wp_dequeue_script('jquery-migrate');
        }

        wp_enqueue_script( 'datatables', '//cdn.datatables.net/1.10.16/js/jquery.dataTables.js');
        wp_enqueue_style( 'datatables', '//cdn.datatables.net/1.10.16/css/jquery.dataTables.css');

        wp_enqueue_script( 'datatables-responsive', '//cdn.datatables.net/responsive/2.2.1/js/dataTables.responsive.min.js');
        wp_enqueue_style(  'datatables-responsive', '//cdn.datatables.net/responsive/2.2.1/css/responsive.dataTables.min.css');

        wp_enqueue_script( 'datatables-row-group', '//cdn.datatables.net/rowgroup/1.0.2/js/dataTables.rowGroup.min.js');
        wp_enqueue_style(  'datatables-row-group', '//cdn.datatables.net/rowgroup/1.0.2/css/rowGroup.dataTables.min.css');
    }

    static function renderVolunteerDashboard(RegistrationsSheet $regSheet) {
        static::includeAdminHeader();
        wp_enqueue_script('lhf-sheets');
        $workTypes = get_option( 'lhfsheets_form_work_types' );
        ?>
        <div class="wrap">
            <form>
<?php
        wp_nonce_field( 'meta-box-order', 'meta-box-order-nonce', false );
        wp_nonce_field( 'closedpostboxes', 'closedpostboxesnonce', false );
?>
            <h1>Frivillige Hammerater</h1>
            <h2 class="nav-tab-wrapper">
                <a href="<?= admin_url( 'index.php?page=frivillig-liste&tab=liste' ) ?>" >Liste</a>
                <a href="<?= admin_url( 'index.php?page=frivillig-liste&tab=preferanser' ) ?>">Arbeidsposter</a>
                <a href="<?= admin_url( 'index.php?page=frivillig-liste&tab=info' ) ?>">Frivilliginfo</a>
            </h2>
            <?php
            $screen      = get_current_screen();
            $columns     = absint( $screen->get_columns() );
            $columns_css = '';
            if ( $columns ) {
                $columns_css = " columns-$columns";
            }
            ?>

            <?php if ( $_GET['tab'] == 'liste' || ! $_GET['tab'] ) { ?>
                <div id="dashboard-widgets" class="metabox-holder<?php echo $columns_css; ?>">
                    <div id="postbox-container-1" class="postbox-container">
                        <?php do_meta_boxes( $screen->id, 'main_list', '' ); ?>
                    </div>
                </div>
            <?php } ?>

            <?php if ( $_GET['tab'] == 'preferanser' || ! $_GET['tab'] ) { ?>
                <div id="dashboard-widgets" class="metabox-holder<?php echo $columns_css; ?>">
                    <div id="preferences-sortables" class="postbox-container">
                        <?php do_meta_boxes( $screen->id, 'preferences', ''); ?>
                    </div>
                    <div id="preferences_left-sortables" class="postbox-container">
                        <?php do_meta_boxes( $screen->id, 'preferences_right', ''); ?>
                    </div>
                </div>
            <?php } ?>
            <?php if ( $_GET['tab'] == 'info' ) { ?>
                        <h3>Annen info</h3>
            <?php } ?>
            </form>
        </div>
        <?php
    }

    static function renderMainList($records, $status = 'registered/served/contacted') {
        /** @var Frivillig $e */
        ?>
        <div class="main">
          <table id="frivillige-hammerater-<?= $status ?>" style="display:none" data-status="<?= $status ?>">
            <?php foreach ($records as $e) { ?>
              <tr> ...  </tr>
            <?php } ?>
            </tbody>
          </table>
        </div>
        <?php
    }

    public static function registerMetaboxes( RegistrationsSheet $regSheet ) {
        if ($_GET['tab'] == 'info') { return; }
        $all = $regSheet->getVolunteerRecords();
        if ($_GET['tab'] == 'liste' || $_GET['tab'] === null) {
            foreach (Frivillig::states() as $state) {
                add_meta_box(
                    "volunteers-search-all",
                    __('Verktøy') ,
                    function () use ($state) { DashboardView::renderGlobalSearchMetaBox(); },
                    'dashboard_page_frivillig-liste',
                    'main_list'
                );

                $peopleWithState = [];
                foreach ($all as $f) { if ($f->status === $state) { $peopleWithState[] = $f; } }

                add_meta_box(
                    "volunteers-$state",
                    DashboardView::$stateName[$state],
                    function () use ($peopleWithState, $state) { DashboardView::renderMainList($peopleWithState, $state); },
                    'dashboard_page_frivillig-liste',
                    'main_list'
                );
            }
        }

        if ($_GET['tab'] == 'preferanser') {
            $workTypes = get_option('lhfsheets_form_work_types');
            foreach ($workTypes as $workType) {
                $workers = [];
                foreach ($all as $frivillig) {
                    $interests = preg_split('/,\s+/', $frivillig->interests);
                    if (in_array($workType['slug'], $interests)) {
                        $workers[] = $frivillig;
                    }
                }
                add_meta_box(
                    "volunteer-prefers-{$workType['slug']}",
                    $workType['description'],
                    function () use ($workers, $workType) { DashboardView::renderPreferences($workers, $workType); },
                    'dashboard_page_frivillig-liste',
                    'preferences'
                );
            }
        }
    }

    public static function renderPreferences($workers, $workType) { ?>
        <ul>
            <?php foreach ($workers as $e) { ?>
            <li data-id="<?= $e->id ?>"> ...  </li>
            <?php } ?>
        </ul>
        <?php
    }

    private static function renderGlobalSearchMetaBox() {
        ?> Søk: <input type="text" onkeydown="window.populateSearchFields(event)" placeholder="<?= __('i alle tabellene') ?>  "> <?php
    }
}

referencias

enlace