数组格式如下：怎么循环获取每组的AA值或BB值或CC的值
又或者把以下格式的多维数组合并到一个数组里，即是把D,C,B数组合并到A数组里
Array
([0] => Array(
[A] => Array
(
[AA] => 1
[BB] => 2
[CC] => 4
)
[B] => Array
(
[AA] => 3
[BB] => 5
[CC] => 7
)
[C] => Array
(
[AA] => 11
[BB] => 22
[CC] => 44
)
[D] => Array
(
[AA] => 00
[BB] => 66
[CC] => 88
)
)
)
