Taking a taxi would be the quickest. If you do not wish to spend $ you could:
take a bus to any park or DTD and hop on the bus for FW or take a bus to MK and take the boat over to FW.
The riding stables are right next to the Transportation center where you get the buses to the other parks and DTD. If you take the boat the boat from MK you will still have to walk to the internal bus stop (which is past Pioneer Hall where the Hoop-Dee-Do is) and take the internal bus to the Transportation Center.