A quite reputable maker of highly touted isolation stands once told me the best thing to use for cable elevation are razor blades.
the Hell you say! Razor blades? Well maybe under your speaker wires, but not mine. he was indeed adamandt about this approach however. Mentioning that the edge simply needs to be roughed off some what and to use double edged blades... sinking one sharp edge into ??? and the dull edge to support the cabling. Repeat as needed.
At the least, I'll give him an E for originallity.