Reza,

Not sure what exactly is the question...but never the less yes as mentioned by you that we dont have any cmd to replace the card.

But I was thinking is the question beeing asked to change the Gbic from 10G to 1 Gig?

If yes then as you know the below command would do the trick:

#conf t

#hw-module module X port-group gig-interface ( This will convert 10 gig to 1 gig).

Ref:http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/44sg/configuration/guide/sw_int.html

HTH

Regards

Inayath