Head on over to 70s Big. Justin wrote another post about Foot Drills that will fix your collapsed arch.
I will give these Foot Drills by Russ Ebbets a try.
Done daily these six drills will eliminate shin splints, Achilles’ tendonitis, plantar fasciitis, lessen the chance of a severe ankle sprain and virtually all knee problems.
Check out more drills on Mobility 101.