<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">管理<b class="caret"></b></a>

                 <ul class="dropdown-menu">

                     <li><?= Html::a('新建文章', ['article/create']) ?></li>

                     <li><a href="<?=Url::toRoute(['article/list']);?>">管理文章</a></li>

                     <li><a href="#">添加栏目</a></li>

                     <li><a href="<?=Url::toRoute(['article-category/index']);?>">管理栏目</a></li>

                 </ul>

             </li>

                 <?php

                 use yii\bootstrap\ButtonDropdown;

                 echo ButtonDropdown::widget([

                     'label' => '操作',

                     'dropdown' => [

                         'items' => [

                             ['label' => '文章列表', 'url' => Url::toRoute(['article/list'])],

                             ['label' => '栏目列表', 'url' => Url::toRoute(['article-category/index'])],

                         ],

                     ],

                 ]);?>