For Local Offers, fetch All cities where offers are active
http://api.offergrid.com/city.json

For Local Offers, fetch all suburbs where offers are active
http://api.offergrid.com/suburb.json/cityname

For Local Offers, fetch all active categories
http://api.offergrid.com/category.json

For Local Offers, fetch all active sub-categories for a city
http://api.offergrid.com/subcategory.json/cityname