如何使用相同的键和值对数组进行分组

I have an array like this:D

我有一个像这样的数组：D

Array
(
[0] => Array
    (
        [type] => AAA
        [label_id] => A1,35
    )

[1] => Array
    (
        [type] => AAA
        [label_id] => A2,34
    )

[2] => Array
    (
        [type] => BBB
        [label_id] => B1,29
    )

[3] => Array
    (
        [type] => CCC
        [label_id] => C1,20
    )

[4] => Array
    (
        [type] => CCC
        [label_id] => C2,19
    )

[5] => Array
    (
        [type] => CCC
        [label_id] => C3,18
    )
)
Ar