How to delete photos off an iphone 4s when it doesn't have the option to delete it?

I have a bunch of old pictures on my phone that i just don't want on my phone anymore, but they're all in about a million different folders and none of them have the option to delete. I figure ill probably end up having to reset my phone, but i hope someone knows how to fix this problem.

I think those are synced through iTunes, explaining why there's no delete option. You would have to remove that sync to get them off.

If the photos are on your iTunes, you can delete the photos from your iTunes library first, and then sync iPhone with iTunes, the photos will be deleted off your iPhone.
If not, you can use some third party software like this iOS file manager, it can scan all the photos on your iPhone and return a file list, you can choose the photos you want to delete. Hope it helps you.