I bought my first road bike. I'm finding that this old mans back is not tolerating will.

I'm thinkging changing the handlebars will help till I lose some weight and get into better shape. I have a few options regarding handlebars. It has ultegra 6500 & 105s, 9x3.

Flat bar - new sifters, front derailleur & brakes I understand.

I've been looking at butterfly handlebars. My question is can I use the ultegra shifters/brakes with this or similar handlebar?
http://www.amazon.com/Mountain-Trekk...27++handlebars

The bike (I'm thinking I want to keep it):
Trek Road bike - 2200 - 58cm.

Thanks so much for help.