Seeking guidance about the Navigation bar links in the Enterprise theme

i have today switched over to Enterprise Theme. On the Navigation bar, there are some links which are actually “Categories” of my blog.

However, the list of those categories is also there on the side bar.
Friends, please guide me as to how i can remove those “links” to categories in Navigation bar and put some other links ( eg links to my other blogs etc) on that navigation bar.

I am waiting for an early response.
Thanks in advance, friends.