Dynamically Hide/show Meta box on run time during category selection for themes and Plugins.

hide_show_metabox.php

<?php 
/**
 * Hide/Show a any div element by selecting a categories for a wordpress theme. 
 *
 * Copy all of these functions to your function.php file,
 *
 * and call => do_action(
 *               'mythemeprefix_hide_meta_for_categories',
 *                array("category1","category2"),
 *               'my_meta_id_div'
 *           ); 
 *   any where on your theme, to hide/show any metabox or div element in admin menu for page or post edit.
 *
 * @author  Digvijay Naruka
 * @version 1.0 10/12/2017
*/

add_action('mythemeprefix_hide_meta_for_categories', 'mythemeprefix_hide_metabox', 10, 2 );
/**
 * Add custom action hook 
 *
 * Do the custom hide_metabox action hook with parameters.
 * 
 * @method custom_function function() use($content) contains the echo of the content(javascript)
 *
 * @param $cat_name     array       array of category names
 * @param $div_id       string      id of the div element.
 * @global $post
 */
function mythemeprefix_hide_metabox($cat_names, $div_id){
    global $post;

    // check if the metabox is for the correct post_type
    if('post' != $post->post_type)
        return;

    //array to store category ids
    $args = array();

    // loop through each category names and get the id.
    foreach ($cat_names as $cat_name) {
        $args[] = mythemeprefix_get_category_id_by_name($cat_name);
    }

    // call the function that contains the JQuery for hiding elements
    $custom_function= mythemeprefix_hide_metabox_on_categories($div_id,$args);

    //Add the javascript from the function to the footer of the admin menu.
    add_action('admin_footer', $custom_function);
}

/**
 * Show/Hide Metabox (or any other div ) for only Specific Categories during category selection.  
 *
 * hide_metabox action with arguments.
 * 
 * Version 1.1 : added dynamic div_id and category parameteres and break from each() loop
 * after the first category is found. 
 * 
 * @param $cat_name     array       array of category names
 * @param $div_id       string      id of the div element.
 * @author Dimas Begunoff
 * @verion 1.0
 * Original available at
 * @link https://www.youtube.com/watch?v=hv1o6NrINu8&t=2s 
 * 
 * @since Version 1.1
 * 
 */
function mythemeprefix_hide_metabox_on_categories($div_id,$args){

    $content = '<script type="text/javascript">';
    $content .='    jQuery(document).ready(function($) {';
    $content .='        function mythemeprefix_hide_metabox_js(){';
    $content .='            $("#'.$div_id.'").hide();';
    $content .="            $('#categorychecklist input[type=".'"checkbox"]'."'".').each(function(i,e){';
    $content .='                var id = $(this).attr("id").match(/-([0-9]*)$/i);';
    $content .='                id = (id && id[1]) ? parseInt(id[1]) : null ;';
    $content .='                if ($.inArray(id, '. json_encode($args) .') > -1 && $(this).is(":checked") ){';
    $content .='                    $("#'.$div_id.'").show();';
    $content .='                    return false;';
    $content .='                }';
    $content .='            });';
    $content .='        }';
    $content .="        $('#categorychecklist input[type=".'"checkbox"]'."'".').live("click", mythemeprefix_hide_metabox_js);';
    $content .="        mythemeprefix_hide_metabox_js();";
    $content .="    });";
    $content .="</script>";
    
    $$return_echoed_content = function() use($content) {echo $content;};

    return $$return_echoed_content;
}

/**
 * Get Category Id by name function
 *
 * @return string
 */
function mythemeprefix_get_category_id_by_name($cat_name){
    $term = get_term_by('name', $cat_name, 'category');
    return $term->term_id;
}

?>