How to split and rebuild an array?

Question

PHP

There is an array. It can be more or less

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [text] => Индия
                    [callback_data] => orderNumber India
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [text] => Китай
                    [callback_data] => orderNumber cn
                )

        )

    [2] => Array
        (
            [0] => Array
                (
                    [text] => Англия
                    [callback_data] => orderNumber UK
                )

        )

    [3] => Array
        (
            [0] => Array
                (
                    [text] => Казахстан
                    [callback_data] => orderNumber KZ
                )

        )

    [4] => Array
        (
            [0] => Array
                (
                    [text] => Вьетнам
                    [callback_data] => orderNumber vietnam
                )

        )

)

Tell me how to get it

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [text] => Индия
                    [callback_data] => orderNumber India
                )

            [1] => Array
                (
                    [text] => Китай
                    [callback_data] => orderNumber cn
                )

            [2] => Array
                (
                    [text] => Англия
                    [callback_data] => orderNumber UK
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [text] => Казахстан
                    [callback_data] => orderNumber KZ
                )

            [1] => Array
                (
                    [text] => Вьетнам
                    [callback_data] => orderNumber vietnam
                )
        )
)

Tried array_chunk($arr,3) doesn't do anything.

Answer 1

array_merge, array_chunk, Example