What you need to do is look at where the code for displaying categories currently is. What it's doing right now is looping through the categories, and creating a new row in the table for each category. What you want it to be doing is creating a new column, so instead of inserting <tr><td>{categoryname}</td></tr> you want it to be inserting <td>{categoryname}</td> when it loops through the categories. This is just pseudocode, mind you, I can't remember the name of the variable you need to plug in off hand. Good Luck!
