codesxt

Sadly I think my client wouldn’t allow it. I’m working for someone else. I’ll ask him tomorrow anyway.

Here I found some of the customizations that the theme has. Maybe this has to do with it since it’s not including rwmb.

jQuery( function ( $ )
{
	'use strict';

	$(document).ready(function(){

		/*if ( $('#_tour_charge_child').length ) {
			$('#_tour_charge_child').change(function(){
				$('#_tour_price_child').closest('.rwmb-field').toggle(this.checked);
			});
			$('#_tour_charge_child').trigger('change');
		}
*/
		if ( $('input[name="_tour_repeated"]').length ) {
			$('input[name="_tour_repeated"]').change(function(){ toggleDatePicker();});
			toggleDatePicker();
		}

		function toggleDatePicker() {
			var flag = true;
			if ( $('input[name="_tour_repeated"]:checked').val() == 1 ) flag = false;

			$('input[name="_tour_date"]').closest('.rwmb-field').toggle(flag);
			$('input[name="_tour_start_date"]').closest('.rwmb-field').toggle(!flag);
			$('input[name="_tour_end_date"]').closest('.rwmb-field').toggle(!flag);
			$('select[name="_tour_available_days[]"]').closest('.rwmb-field').toggle(!flag);
		}

		if ( $('.ct_datepicker').length ) {
			$('.ct_datepicker').datepicker({ dateFormat: "yy-mm-dd" });
		}
        
		if ( $('.has_multi_schedules').length ) {
			$('.has_multi_schedules').change(function(){
				var $wrapper = $(this).closest('.schedule-wrapper');
				var $check_box = this;
				$wrapper.find('.add-clone, .remove-clone, .schedule-header').toggle(this.checked); // hide add-clone, remove-clone, date fields
				$wrapper.find('.rwmb-clone').each(function(index){
					if ( index != 0 ) $(this).toggle($check_box.checked);
				}); // hide the other schedules
			});
			$('.has_multi_schedules').trigger('change');
		}
	});
} );

Here is the code that I use to add the clonable metaboxes to the corresponding Meta Box on the site:

<?php

if ( ! defined( 'WPINC' ) ) {
	die;
}

add_filter( 'rwmb_meta_boxes', 'gcbti_add_tb_fields_to_tour', 20 );
function gcbti_add_tb_fields_to_tour( $meta_boxes ) {
  foreach ( $meta_boxes as $k => &$meta_box ) {
    if ( isset( $meta_box['id'] ) && 'tour_default_details' == $meta_box['id'] ) {
      array_push(
        $meta_box['fields'],
        array(
          'name'         => 'Travel Builder Services',
          'id'           => "_tour_tb_services",
          'desc'         => 'Ingrese el Service ID de Travel Builder',
          'placeholder'  => 'Ingrese el ID',
          'type'         => 'tb-services-list',
          'service_type' => 'tour',
          'clone' => true,
          'clone_as_multiple' => true,
          'add_button' => 'Añadir otro ID'
        ),
        array(
          'name'         => 'Travel Builder Packages',
          'id'           => "_tour_tb_packages",
          'desc'         => 'Ingrese el Package ID de Travel Builder',
          'placeholder'  => 'Ingrese el ID',
          'type'         => 'tb-packages-list',
          'service_type' => 'tour',
          'clone' => true,
          'clone_as_multiple' => true,
          'add_button' => 'Añadir otro Paquete'
        )
      );
    }
  }
  return $meta_boxes;
}

From Meta Box we are only using Meta Box and Meta Box Group. I have also developed some custom fields and pages.