The old 4.x way of doing AP Groups and WLAN Override

Things have changed a lot since 4.2, but for the lab - time is standing still with the 4.2 code.  Don't forget that you'll be expected to do things as the used to be done, not as they are now in 6.0 code..

AP Group VLANs with Wireless LAN Controllers Configuration Example

Configuring AP Groups

In a typical deployment, all users on a WLAN are mapped to a single interface on the controller. Therefore, all users associated with that WLAN are on the same subnet or VLAN. However, you can override this default WLAN setting to distribute the load among several interfaces or to group users based on specific criteria such as individual departments (for example, marketing) by creating access point groups (formerly known as site-specific VLANs). Additionally, these access point groups can be configured in separate VLANs to simplify network administration.

Using the CLI to Configure WLAN Override
Use these commands to configure the WLAN override feature for a specific access point using the controller CLI.
1. To enable or disable the WLAN override feature for a specific access point, enter this command:
config ap wlan {enable | disable} {802.11a | 802.11b} Cisco_AP
2. To define which WLANs you want to transmit, enter this command:
config ap wlan add {802.11a | 802.11b} wlan_id Cisco_AP 

and the old way of doing selective SSIDs from the access points - WLAN Override:

Configuring WLAN Override
By default, access points transmit all defined WLANs on the controller. However, you can use the WLAN override option to select which WLANs are transmitted and which are not on a per access point basis. For example, you can use WLAN override to control where in the network the guest WLAN is transmitted, or you can use it to disable a specific WLAN in a certain area of the network.

Using the CLI to Create Access Point Groups
To create an access point group using the CLI, enter this command:
config ap group-name group_name
To assign an access point to an access point group using the CLI, enter this command:
config ap group-name group_name ap_name