/**
  * Enqueue plugin script
  * 
  */
 public function print_script()
 {
     wp_enqueue_script('repeat', B5F_Multisite_Categories::get_instance()->plugin_url . 'js/msc-repeatable.js', array('jquery-ui-sortable', 'jquery-ui-core', 'jquery'));
 }
 /**
  * Add new field in /wp-admin/network/site-new.php
  * has to be done with jQuery
  *
  * URI: http://stackoverflow.com/a/10372861/1287812
  */
 public function new_site_input_field_scripts()
 {
     $url = B5F_Multisite_Categories::get_instance()->plugin_url . 'js/msc-dropdown.js';
     wp_register_script('b5f_msc', $url);
     wp_enqueue_script('b5f_msc');
     wp_localize_script('b5f_msc', 'b5f', array('dropdown' => B5F_Multisite_Categories::get_instance()->get_dropdown('')));
 }
 /**
  * Access this plugin’s working instance
  *
  * @wp-hook plugins_loaded
  * @since   2012.09.13
  * @return  object of this class
  */
 public static function get_instance()
 {
     NULL === self::$instance and self::$instance = new self();
     return self::$instance;
 }