A bendable wire or cable using multi-replicatoin start with creating a path...there are several available to choose from in the create menu. Next you create a metaball and attach it to the path. Multi-replicating the metaball will cause it to follow the path giving you what appears top be a bent cable, rope or wire. That is the gist of it...I am sure you can find a more in depth explanation by searching the forum.