One thing you could do is buy you a REALLY cheappair of speaker stands made from MDF, sit them between your amp and speakers, and use them as a cable props. If this does not work find you some yellow "POLICE LINE - DO NOT CROSS" tape and string it up from wall to wall in front of your entire system.
Wife stepping on speaker wire
I'm looking for a heavy duty, thick pair of speaker wire that she can see from a great distance. I have never come across a person that has no regard where she plops down her size 8's. Any suggestions would be a god send.