Cisco's 1260 wireless access point can be run in two modes, the most common seems to be in LAP or lightweight mode, this requires a wireless controller to function, or the other mode is Autonomous which means it runs as a stand alone Access point without any dependancy on other devices.

The LAP can be converted to Autonomous mode by reflashing IOS with a different image.

This page covers upgrading a Lightweight (LAP) 1260 Access point to autonomous mode. This means it will function independent of any Wireless Controller.

It will also cover setting up multiple SSIDs with a trunk uplink to the switch.

Hint:- Use https://www.draw.io/. for block diagram of ios and bridge groups