You either need to use CFW which still has to be wired or get a CronusMax.
PS3's wireless protocol is bluetooth, the 360's wireless protocol is radio frequency.
Even with CFW, it's completely impossible to use a wireless 360 controller on the PS3 without extra hardware.
Seems like it yes.
Unless you can write a driver for the wireless adapter that's used on PC.
It's impossible.
The buttons on the 360 and PS3 controller are completely different.