public static function all()
    {
        $connection = Yii::app()->db;
        $sql = 'SELECT * FROM `services` ORDER BY name ASC';
        $models = $connection->createCommand($sql)->queryAll();
        $return = [];
        foreach ($models as $id => $name) {
            $return[$id] = $name;
            var_dump($return);
        }

        return $return;
    }