Всем добрый день. Помогите решить следующую задачу:
Имеется массив

Array
(
    [0] => Array
        (
            [0] => 7. Round1X2
        )

    [1] => Array
        (
            [2] => West Brom
            [3] => Everton
            [11] => 28.09.2015
        )

    [2] => Array
        (
            [2] => Watford
            [3] => Crystal Palace
            [11] => 27.09.2015
        )

    [11] => Array
        (
            [0] => 6. Round1X2
        )

    [12] => Array
        (
            [2] => Liverpool
            [3] => Norwich
            [11] => 20.09.2015
        )

    [13] => Array
        (
            [2] => Southampton
            [3] => Manchester United
            [11] => 20.09.2015
        )
)

Как из него получить массив вида:

 [0] => Array

    [1] => Array
        (
            [0] => 7. Round1X2
	    [2] => West Brom
            [3] => Everton
            [11] => 28.09.2015
        )

    [2] => Array
        (
            [0] => 7. Round1X2
            [2] => Watford
            [3] => Crystal Palace
            [11] => 27.09.2015
        )

    [12] => Array
        (
            [0] => 6. Round1X2
	    [2] => Liverpool
            [3] => Norwich
            [11] => 20.09.2015
        )

    [13] => Array
        (
            [0] => 6. Round1X2
            [2] => Southampton
            [3] => Manchester United
            [11] => 20.09.2015
        )
)