Mikrotik for Wifi only

I have seven Mikrotik APs. The firewall is Fortigate. In which all vlans and other network rules are made. There is also one Mikrotik router/firewall. How to configure Mikrotik only for Wifi networks (so that basically the Mikrotik router/firewall is a Wifi controller).

http://forum.mikrotik.com/t/forum-rules/173010/1