/**
  * add admin nodes
  * @since: 5.0.5
  */
 public static function add_admin_menu_nodes()
 {
     if (!is_super_admin() || !is_admin_bar_showing()) {
         return;
     }
     self::_add_node('<span class="rs-label">Slider Revolution</span>', false, admin_url('admin.php?page=revslider'), array('class' => 'revslider-menu'), 'revslider');
     //<span class="wp-menu-image dashicons-before dashicons-update"></span>
     //add all nodes of all Slider
     $sl = new RevSliderSlider();
     $sliders = $sl->getAllSliderForAdminMenu();
     if (!empty($sliders)) {
         foreach ($sliders as $id => $slider) {
             self::_add_node('<span class="rs-label" data-alias="' . esc_attr($slider['alias']) . '">' . esc_attr($slider['title']) . '</span>', 'revslider', admin_url('admin.php?page=revslider&view=slide&id=new&slider=' . intval($id)), array('class' => 'revslider-sub-menu'), esc_attr($slider['alias']));
             //<span class="wp-menu-image dashicons-before dashicons-update"></span>
         }
     }
 }