Here is a popular table from our recent Infectious Diseases Society of America Diabetic Foot Infection Guidelines discussing suggested durations of therapy for soft tissue and bone infections.
How long do we treat diabetic foot infections and osteomyelitis? Here’s a menu.

Seems appropriate, but where is the data to support ?
Click on the Link: http://www.idsociety.org/uploadedFiles/IDSA/Guidelines-Patient_Care/PDF_Library/2012%20Diabetic%20Foot%20Infections%20Guideline.pdf
The IDSA Guidelines are well-supported and referenced!