The easiest way you can try is:
1) Create new menus via Simple CMS module. They will have names of your categories and will link to actual category pages.
2) Apply custom CSS rule that will hide categories section. I used this rule:
Code:
.block-top-categories {display: none;}
It is really easy and takes 5 minutes to apply. After that I got the following result:
http://awesomescreenshot.com/0eb2b2eb62
Is it what you need?