I have come up with a crapy hack for this issue for my mod. 1) Create a Crafting station for every Category you want with a unique key word to ID it for recipies. 2) Place them someplace hidden 3) Create a talking activator that looks like the crafting station you want. 4) Give it a quest/Dialgue for each category that 'Activates' your stations. You will still have the 'Misc' Catagory, but at least you can organize better. In my case, it is used for a "Spell Craft" station that lets you spend Dragon Souls for spell books. I didn't want every single spell in the game in a single category.