You simply need a hotshoe adapter, audio cables, and a splitter.
The 1/8" (3.5mm) miniphone and 1/4" (6.5mm) phone plugs and jacks are identical to mono audio connectors. There are only two electrical connections going on with flash sync: ground and the sync signal. You can use stereo cables, as well, but one of the channels won't be used.
Get a hotshoe to 1/8" adapter (you can get PC as well, but in this case, why bother going there if you don't need to? minijacks/plugs are far more robust, and more easily and cheaply sourced than PC connectors), for your camera hotshoe, a length of 1/8" minijack cable, and a 1/8->1/4" adapter to connect the camera to a 1/4" splitter, and then two 1/4" audio cables to connect the splitter to the lights.
Obviously, radio triggers are likely to be more convenient and possibly even lower cost than going wired, but you may still need to get 1/8" or PC -to-1/4" adapters to hook the radio receivers up to your lights.