<nav id="menu-mover">
            <ul >
              <?php
              $menu = wp_get_nav_menu_items('Menu Principal');

              global $post;
              $id_menu = $post->ID;

              if($id_menu==''){
                $id_menu = 31;
              }

              $menus = array();

              foreach($menu as $m){
                if($m->menu_item_parent==0) continue;
                if($m->object_id == $id_menu || $m->object_id == $id_menu || $curr2==$id_menu){
                  $curr2 = $m->menu_item_parent;
                }
                $menus[$m->menu_item_parent][] = $m;
              }

              foreach($menu as $m){

                if($m->menu_item_parent!=0) continue;

                $curr='';
                if($m->object_id == $id_menu || $m->object_id == $id_menu || $curr2==$m->ID){
                  $curr = "class='activo'";
                }


                if($m == end($menu)){
                  $curr = "class='last'";
                }


                if($m->url!=""){
                  $link = $m->url;
                } else if($m->object=="category"){
                  $link = get_category_link($m->object_id);
                } else {
                  $link = get_the_permalink($m->object_id);
                }

                echo '<li '.$curr.'><a class="desplegable" href="'.$link.'">'.($m->title).'</a>';

                if(count($menus[$m->ID])>0){
                  echo "<a href='javascript:void(0);' class='mas'>+</a>";
                  echo "<ul class='sub' style='display:none'>";

                  foreach($menus[$m->ID] as $m2){
                    $target='';
                    if($m2->object=="category"){
                      $link = get_category_link($m2->object_id);
                    } else if($m2->object=='custom'){                 $target = "target='_blank'";
                    $link = $m2->url;
                  } else {
                    $link = get_the_permalink($m2->object_id);
                  }

                  $curr='';
                  if($m2->object_id == $id_menu || $m2->object_id == $id_menu){
                      $curr = "class='activo'";
                  }
                  echo "<li ".$curr."><a ".$target." href='".$link."'>$m2->title</a>";
                  echo "</li>";
                }
                echo "</ul>";
              }
              echo '</li>';
            }
            ?>
          </ul>
        </nav>