So you want to move your flash off camera? Sure you can use inexpensive wireless triggers, but the biggest drawback to moving a flash off camera, is losing ETTL communication and High Speed Sync. Unless of course you're shelling out some serious cash for a wireless remote system like Radio Poppers to supports this. YouTube member Matthewrichey created a video showing you how to take basic Cat5 cables and connectors to modify those short off camera flash cables giving them variable length.
Although he took the time to make a video showing you what the end result could look like, this is not his original idea. You'll find people were doing this several years ago, and there's some instructional step by step info over at DIYPhotography.net (here).
Some event Photographers run with a Flash on top of a Monopod, so they can bring it up high or move it around before snapping a picture. To keep communication between the camera so you can adjust flash compensation, this technique would require several feet of cable. If you're not the DIY type, you could just check out some of the existing 33ft (10 meter) long cords available for not much more than $30 bucks, saving you from buying an expensive set of Radio Poppers (and not having to worry about batteries for the triggers).
Pixel Super Long 33ft 10 Meter E-TTL Off-Camera Flash Sync Cord for Canon