fronted/views/layouts/main.php或者backend/views/layouts/main.php中，

<div class="wrap">
    <?php
    NavBar::begin([
        'brandLabel' => 'Yii后台管理系统',
        'brandUrl' => Yii::$app->homeUrl,
        'options' => [
            'class' => 'navbar-inverse navbar-fixed-top',
        ],
    ]);
    $menuItems = [
        ['label' => '首页', 'url' => ['/site/index']],
        ['label' =>'会员管理', 'url' => ['/user/index']],
        ['label' =>'分区管理', 'url' => ['/part/index']]
    ];
    if (Yii::$app->user->isGuest) {
        $menuItems[] = ['label' => '登录', 'url' => ['/site/login']];
    } else {
        $menuItems[] = '<li>'
            . Html::beginForm(['/site/logout'], 'post')
            . Html::submitButton(
                '退出 (' . Yii::$app->user->identity->username . ')',
                ['class' => 'btn btn-link']
            )
            . Html::endForm()
            . '</li>';
    }
    echo Nav::widget([
        'options' => ['class' => 'navbar-nav navbar-right'],
        'items' => $menuItems,
    ]);
    NavBar::end();
    ?>