ahart44 - I also have a kitty who chews wires - I posted about it here and got some really good replies from PT folks:
wool sucking
Does your kitty also do the wool sucking? Anyway, I do have had pretty good results with the sleeves of plastic from the hardware store. Another thing I bought was clear plastic aquarium tubing as it is softer and pretty easy to slice up the side. Our Lowes has some presliced rigid strips that are designed to hide electrical cord along floorboards, etc. I bought some of those just because they make the wires look so neat

We still lose tiny speaker wires now and then - mostly we have learned never to leave them out on tables, etc - or they get chewed up. We have also gotten in the habit of using paper bags at the grocery store - these do double duty because they are terrific poop scooping bags

Good luck!