For bridging of dot1q-trunks only a single SSID is used. The VLANs
are created as subinterfaces on the Ethernet- and Radio-Interfaces.
With the GUI use SERVICES->VLAN to create the VLANs.
This will create the subinterfaces and bridge groups on both Ethernet-
and Radio-IF. (If you don't mark any VLAN as native, VLAN 1 is native)
To configure VLANs using the CLI, you might want to take a look at
http://www.cisco.com/en/US/products/ps5861/products_configuration_guide_chapter09186a00804ed724.html
IIRC correctly the management IP of the bridge is always in the native VLAN.