Soap operas often feature couples who eventually trade partners within their myriad of storylines over the years, so Tyler Christopher (Nikolas Cassadine, “General Hospital”) and Ronn Moss (ex-Ridge Forrester, “The Bold and the Beautiful”) should have no trouble with their latest challenge: They’ll be appearing on tonight’s edition of ABC’s “Celebrity Wife Swap,” where their wives will trade households, lifestyles and children for an entire week!