What a wonderful idea. A lot of times we end up with the type of collars that can be very easily transformed into something rather beautiful and a lot more appealing. Just look how easy, with basic crochet chains you can make a wonderful bubble looking collar. The tutorial is so easy I find it hard to call a tutorial at all.
I am not sure who is a creator of these images, they come across on a lot of various websites and thus I can’t link you to the original source. However, I do think that the photo explanation speaks for itself and has nothing left aside to be talked about.