Pepper1

<?php Pjax::begin([
    'id' => 'list-messages',
    'enablePushState' => false,
    'formSelector' => false,
    'linkSelector' => false,
]) ?>
<?= $this->render('_list', ['dataProvider' => $dataProvider, 'pages' => $pages,]) ?>
<?php Pjax::end() ?>

<?php $this->registerJs(<<<JS
        function updateList() {
          $.pjax.reload({container: '#list-messages'});
        }
        setInterval(updateList, 150000);
JS
    ); ?>

RewriteCond %{HTTP_HOST} ^(?>www\.|)([^.]+)\.site\.ru$ [NC]
RewriteRule ^(.*)\.html$ index.php?city=%1&articles=$1 [L]

public function formName()
{
    return '';
}