highlight accordion menu on mouse over

Hi folks,

I'm using angular-ui-bootstrap. Currently, when I mouse over the menu, it
just underlines it just like in the screenshot I made below. I want it to
get highlighted similar on the lower part of the pic. I used the code from
the http://angular-ui.github.io/bootstrap/#/accordion

Here is the picture
http://i.imgur.com/VL4E3yT.png

Any help would be greatly appreciated.

Thanks,

Neil