<?php
add_action( 'init', function () {
    $labels = array(
        'name'               => _x( 'Events', 'Post Type General Name', 'text_domain' ),
        'singular_name'      => _x( 'Event', 'Post Type Singular Name', 'text_domain' ),
        'menu_name'          => __( 'Events', 'text_domain' ),
        'name_admin_bar'     => __( 'Event', 'text_domain' ),
        'archives'           => __( 'Item Archives', 'text_domain' ),
        'attributes'         => __( 'Item Attributes', 'text_domain' ),
        'parent_item_colon'  => __( 'Parent Item:', 'text_domain' ),
        'all_items'          => __( 'All Items', 'text_domain' ),
        'add_new_item'       => __( 'Add New Item', 'text_domain' ),
        'add_new'            => __( 'Add New', 'text_domain' ),
        'new_item'           => __( 'New Item', 'text_domain' ),
        'edit_item'          => __( 'Edit Item', 'text_domain' ),
        'update_item'        => __( 'Update Item', 'text_domain' ),
        'view_item'          => __( 'View Item', 'text_domain' ),
        'view_items'         => __( 'View Items', 'text_domain' ),
        'search_items'       => __( 'Search Item', 'text_domain' ),
        'not_found'          => __( 'Not found', 'text_domain' ),
        'not_found_in_trash' => __( 'Not found in Trash', 'text_domain' ),
    );
    $args   = array(
        'label'        => __( 'Event', 'text_domain' ),
        'labels'       => $labels,
        'supports'     => array( 'title', 'editor' ),
        'hierarchical' => false,
        'public'       => true,
    );
    register_post_type( 'event', $args );
} );
add_action( 'init', 'wpde_create_event_type_taxonomy' );
function wpde_create_event_type_taxonomy() {
    $labels = array(
        'name'          => _x( 'Event Types', 'taxonomy general name' ),
        'singular_name' => _x( 'Event Type', 'taxonomy singular name' ),
        'search_items'  => __( 'Search Event Types' ),
        'all_items'     => __( 'All Event Types' ),
        'edit_item'     => __( 'Edit Event Type' ),
        'update_item'   => __( 'Update Event Type' ),
        'add_new_item'  => __( 'Add New Event Type' ),
        'new_item_name' => __( 'New Event Type' ),
        'menu_name'     => __( 'Event Type' ),
    );
    $args   = array(
        'hierarchical'      => true,
        'labels'            => $labels,
        'show_ui'           => true,
        'show_admin_column' => true,
        'query_var'         => true,
        'rewrite'           => array( 'slug' => 'event-type' ),
    );
    register_taxonomy( 'event-type', 'event', $args );
}

/* The plugin not working */
add_filter( 'rwmb_meta_boxes', 'register_event_type_meta_boxes' );
function register_event_type_meta_boxes( $meta_boxes ) {
    $prefix = 'thsectcp_';
    // Event custom post meta box
    $meta_boxes[] = array(
        'id'         => 'Event Type',
        'title'      => 'Event Type Custom Fields',
        'taxonomies' => 'event-type',
        'fields'     => array(
            array(
                'id'      => $prefix . 'feature_image',
                'type'    => 'image_advanced',
                'columns' => 12,
            ),
        ),
    );

    return $meta_boxes;
}