There is different way to build youl internal link structure such as blog and homepage links. Magento give you a second option to build categories and subcategories content by adding a static block under Custom design > Custom layout update
Add the following code:
<block type="cms/block" name="cooking2" after="-">
It will display you new block under you subcategories and will give you space for your internal link structure. See ex: Zombicide & Magic Cards categories. For some themes, this option is not working properly such as on iconista website where we need a proper coder to custom the layout.