List categories above calendar view for quick frontend filtering

Since The Event Calendar uses taxonomies for categories you simply need to query for that particular taxonomy and spit out the records. This should do it: https://gist.github.com/2019513

Just put the code at the top of your gridview.php template file. Make sure you first setup a template override for gridview.php if you haven’t already by creating an ‘events’ folder in your theme directory and copying gridview.php in there. This will allow you to retain your changes to it when you update.