Код: Выделить всё
<li><?=Yii::$app->user->isGuest ?
( Html::a('Войти', ['/user/security/login', 'id' => $id], ['class' => 'profile-link']) )
: ('<li>' . Html::beginForm(['site/logout'], 'post')
. Html::a("Выход", ['/site/logout'], [
'data' => ['method' => 'post'],
'class' => 'white text-center',])
. Html::endForm(). '</li>')?></li>
/ul>