public function actionPortfolio()
{
$filter = Yii::$app->request->get("filter", "all");
$page = Yii::$app->request->get("page", 1);
$data = Portfolio::getPortfolio($filter, $page);
return $this->render('portfolio', ['elements' => $data['elements'], 'pagination' => $data['pagination'], 'filter' => $filter]);
}