On your site, I can see at the bottom in the first widget ara, a drop down with categories.
I think that these should be tags and your pages, politics, lifestyle, humor (top nav) should be categories. That way you can then used these in your nav bar.
When planning your taxonomy (categories and tags) I like to think of these as menu items.
Categories: Breakfast, lunch ,dinner
Tags: Soups, sandwiches, pasta, fish, chicken etc....