Help in listbox binding parent and child. move to next listb

Question

Hi

i have two list boxes in which i have to move data item in between of two.

but the main thing is first of all i have data in parent child relations.

e.g.
-Parent 1
-- child1
-- child 2
-Parent 2
-- Child 1
-- Child 2

i have maintain dis order during databing in way which can distinguish them as parent child.

also when i want to move any of item in the next textbox the order should remain same.
meanse i want to shift child 1 in two next listbox parent one  has to go there.
up down order allow in between parent.

Please help me to solve this problem. Thanks in advance.

Omkar