authors instructions you need to open index.tpl in a program like notepad. Look for the commented area called "Navigation". There are basically two parts. The first part is a area preceeded by a {if $head_version < 1.1} This is the part you need to change. Put the url you would see in the bottom of browser window (in the status bar) if you put your mouse over one of your categories. For example - if I put my mouse over the photoshop category - I see http://www.bexology.com/index.php?/categories/2-photoshop. So you would put in index.tpl $serendipityBaseURL}index.php?/categories/2-Photoshop">Photoshop
The second part starts in that area with the {else}- all you need there is the same number of li's that you have above. They are also sequentially numbered - so keep the numbering. You'll notice it if you look closely. I hope this helps? It is a lot easier than it sounds."