la idea es que el array $cate quede asi
Código HTML:
Array
(
[1] => Array
(
[super] => cat1
[sub] => Array
(
[2] => cat2
[3] => cat3
[4] => cat4
)
)
[5] => Array
(
[super] => cat5
)
[6] => Array
(
[super] => cat6
[sub] => Array
(
[7] => cat7
[8] => cat8
)
)
)