Total includes various “Filter” styles grids that allow you to click on a category and it will sort the items to display only those in a particular category. And if you want you can actually link directly to a category using the category name from a URL like this:
// Using the name http://your-url.com/?filter=design // OR using the term ID http://your-url.com/?filter=43
Where “design” is the name of the category you wish to filter by.