I'm trying to add a new category to the crafting screen "Wood" in which wooden recipes will be sub categorized into... The only problem is i cant seem to find where to add "wood" to the categories. Does anyone know?

Categories are hardcoded. You can add new items to specific categories by tagging them with a specific Material Keyword (ex: a piece of armor tagged with ArmorMaterialEbony will show up in the Ebony category), but you cannot make your own categories.

Oh ok, thank you for your help