How to break and rebuild the array?

There is an array. It can be more or less
Array
(
 [0] => Array
(
 [0] => Array
(
 [text] => India
 [callback_data] => orderNumber India
)

)

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

)

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

)

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

)

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

)

)

Tell me how to get
Array
(
 [0] => Array
(
 [0] => Array
(
 [text] => India
 [callback_data] => orderNumber India
)

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

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

)

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

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

Tried array_chunk($arr,3) does nothing.
March 19th 20 at 08:33
1 answer
March 19th 20 at 08:35
Solution
array_merge, array_chunk, Example

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