Yes bridging is supported in Native IOS
Do the search bridging
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/12_1e/ol_2310.htm
Integrated routing and bridging (IRB) and concurrent routing and bridging (CRB) have deliberately been disabled on the Catalyst 6000 family switches and Cisco 7600 Series Internet Routers. You should use routable Layer 2 VLANs and VLAN interfaces for normal bridging and interVLAN routing. Bridge groups are supported only to bridge nonroutable protocols.
Hope this helps
Erum