I've tried rubbing no-scent fabric softeners to my dogs (I know this is a cat forum) and it has eliminated the static.
Heh heh... that's quite a problem.
You can try using an EFA oil to promote a healthier...errr..."moister" coat. Daily brushing could help as well.
Otherwise, you may have to attach little kitty sized lightening rods to your cats' tails!!! :->
It sounds like you need more moisture in the air (in your home.) Try getting a humidifier for your home or putting bowls of water out in every room. It can really help!