Item categories can be create to display groups of items. You can edit category names or reorder them by dragging and dropping them.
1) Click "Auctions" on the far left.
2) Click on "Manage Auctions".
3) Click on the Name of your auction.
4) Click "EDIT".
5) Click "Custom Categories".
6) Type in the new Category name and hit "Add". Edit using the pencil icon or reorder by dragging and dropping into place.