Let's say you have vlan 10,20 and 30 and you want to create 3 ssid and assign them accordingly.
1. Firstly make sure that all your APS are connected to a trunk port.
2. Tag / Allow them with vlan 10,20,30.
3. Go to respective ssid >> under advance options >> access vlan >> enter respective vlan 10 or 20 or 30.
I would not suggest you to tunnel all the 3 ssid's. Henceforth you are directing all the traffic to the controller. Having APs serving their own client traffic would be much better than redirecting all the client traffic towards ZD1100. This would evtually hit the performance graph.