i need help with menu that produces categories

i have a problem with my setup of this webpage http://www.kickdrivemedia.com

in the mid section there is a menu but links put in /category/ for some reason like
http://www.kickdrivemedia.com/category/seo/

Does anyone know how i can change this so the links are just kickdrivemedia.com/seo etc…

Im gretting frustrated here guys 😉

BR
Tobias