How to make hierarchial structure from flat structure

[Anonymous]

From flat structure how can i make hierarchial structure-

col1  col2   col3  col4---> (CHILD)

--------------------------------

A

A      B      C

A      B      D      E

A      B      F              

A      B      G      H

A      J      G      I

i want to out put like -

A+

if you click on + beside A,  B+,J will open...

....

[nagaiank]

A sample application is attached which may give you some clues for implementing what you want.