How do you change the Left tab area?

Hi,
suppose you have tab written as Popular News on the left and you want to add "announcement" but the word gets hidden. How to you increase that tab area to show Announcement. Thanks

We would need to see outcome on live page to see what to change

The site is www.mirza-abbas.com/ . Look at the tab with announcement.

In template_css.css after this:

#tabs > ul > li {
display: block;
height: 40px;
line-height: 40px;
float: left;
width: 25%;
text-align: center;
outline: none;
}

add this:

.mp_left #tabs > ul > li{
width: 50%;
}