This is an automatic feature from HubPages. Over time as you write Hubs they will become categorized by similar topic. A good way to organize your Hubs so that they can be linked together by topic is by creating Hub Groups. Check out this link from the Learning Center for more information: http://hubpages.com/community/Learning-Center-Hub- My advice is to write more Hubs and over time you will begin to see them in categories on your profile. I hope this answers your question!