Customers who have several general WLAN/SSID's they wish to have across multiple Zones create the initial Zone with those WLAN's and then create Zone Templates. Applying the Zone Templates to new Zones will put in the standard WLAN's created in the Template. Unfortunately this only works when creating new Zones based on the standard template.
In addition to Albert's suggestion, you can also create WLAN templates for each individual WLAN such that it is easily replicated across all zones. Then you can make changes centrally to the template and push it out to all zones.