Array
    (
       [0] => Array
           (
               [mark] => Toyota
            )

       [1] => Array
           (
               [mark] => Nissan
            )

       [2] => Array
           (
               [mark] => Ваз
            )

$arr = array(
                    array('mark' => 'Toyota'),
                    array('mark' => 'Nissan'),
                    array('mark' => 'Ваз'),
        );