Displaying output as same as cost element group hirearchy

Hi all

Actually there is one set for cost element groups. I am trying to display a report output , which should mirror the cost element hirearchy. I am facing problem in implementing the logic to display the output in the same manner as in cost element group.

Because , the cost element group is a tree structure having nodes at different levels and cost element at the lower level.

please help me out with any suggestions that u have.