Magath was sacked by Fulham last week.
Speaking on Match of the Day 2 extra Murphy revealed: "He told him (Brede Hangeland) to put a lump of cheese soaked in alcohol on his thigh and to leave it on overnight.
"The club doctor, who is no longer at the club, who I know well didn't think it was the best idea, but Brede did it regardless.
"It's one of many ridiculous sad stories that we've heard about Felix that has ultimately cost him his job and put Fulham in a world of trouble because all the good and experienced players they were here were desperate to leave because of it and did."
For the big stories and the banter follow us on Twitter: @tribalfootball
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!