I was wondering if there was a way (other than individually clicking each item's drop down box) to move lots of items between categories on my wishlists.

Unfortunately not. But I find it goes faster if you just click the dropdown, press the key for the first letter of the WL category you're moving to, then click the next one. Though I keep my WL categories organized with letters so if you have multiple categories that start with the same letter, you might be better off just temporarily renaming one to get all your things moved.

Ah, that's a shame! Thanks for the tip though! In the future I guess I'll set the wishlist I'm expanding to default so I don't have to move all the items around after.

You're welcome c: Yeah, that definitely helps too. It's a really nice feature and I definitely use it when I'm looking for TC items c: