Customizing navigation tree's display to be descendent

Hello,

I would like some hints regarding the following theam, i need to make  the display of nodes(folders under folders A descending not ascending but i have no clue how to achieve that, and  I'm having a hard time managing to accomplish that. Any advices  or hints are welcomed.

Cabinet/A/B_10:30

                /B_10:20

                /B_10:10

(where 10:xx is creation time)

Thank you