YII，菜单折叠

          [
              'label' => '新闻相关',
              'items' => [
                   [ 'label' => '新闻', 'url' => ['/news/index'] ],
                   '<li class="divider"></li>',
                   [ 'label' => '新闻图集', 'url' => ['news-photo/index'] ],
                  '<li class="divider"></li>',
                   [ 'label' => '轮播幻灯', 'url' => ['/slide-show/index'] ],
              ],
          ],          
          [
              'label' => '商品和订单',
              'items' => [
                   [ 'label' => '商品列表', 'url' => ['goods/index']],
                   '<li class="divider"></li>',
                   [ 'label' => '订单列表', 'url' => ['order/index']],
              ],
          ],

YII，菜单折叠