Need help creatig array of array

Hi, Everybody

I am getting the array from database in this structure:

Array (
[0] =>
Array (

[MAIN_CODE] => MAINTEST1
[SUB_CODE] => SUBTEST1
[MAINCODE_STATUS] => N
[SUBCODE_STATUS] => N
[CODE_TEST] => YES
)
[1] => Array (

[MAIN_CODE] => MAINTEST1
[SUB_CODE] => SUBTEST2
[MAINCODE_STATUS] => N
[SUBCODE_STATUS] => N
[CODE_TEST] => NO
)
)
but I want the create output for above array in different array structure that below I mentioned:

Array(
[MAINTEST1] =>
Array(
MAINCODE_STATUS => N
SUBTEST1 =>
Array(
SUBCODE_STATUS => N
CODE_TEST => YES
)
SUBTEST2 =>
Array(
SUBCODE_STATUS => N
CODE_TEST => NO
)

)
)

Can anybody help me how create this array using PHP.

Regards
Tanmoy