Array
(
[0] => Array
(
[id] => 49
[name] => 体育部
[parent_id] => 46
[children] => Array
(
[0] => Array
(
[id] => 52
[name] => 体育1专业
[parent_id] => 49
[children] => Array
(
[0] => Array
(
[id] => 57
[name] => 1班
[parent_id] => 52
)
[1] => Array
(
[id] => 58
[name] => 2班
[parent_id] => 52
)
[2] => Array
(
[id] => 59
[name] => 外留学班
[parent_id] => 52
)
)
)
[1] => Array
(
[id] => 53
[name] => 体育2专业
[parent_id] => 49
[children] => Array
(
[0] => Array
(
[id] => 60
[name] => 1班
[parent_id] => 53
)
[1] => Array
(
[id] => 61
[name] => 2班
[parent_id] => 53
)
[2] => Array
(
[id] => 62
[name] => 3班
[parent_id] => 53
)
[3] => Array
(
[id] => 63
[name] => 4班
[parent_id] => 53
)
[4] => Array
(
[id] => 64
[name] => 5班
[parent_id] => 53
)
)
)
)
)
)
具体的数组是这样的
因为这个层数是不固定的，下面可能还有children，我想设置一个数，限制它的遍历层数，例如限制遍历一层，结果如下：
可以理解成一个 children 是一层，请各位高手出手
Array
(
[0] => Array
(
[id] => 49
[name] => 体育部
[parent_id] => 46
[children] => Array
(
[0] => Array
(
[id] => 52
[name] => 体育1专业
[parent_id] => 49
)
[1] => Array
(
[id] => 53
[name] => 体育2专业
[parent_id] => 49
)
)
)
)
