I've got a menu structure such as this
1 About_us 1.1 Physicians 1.2 Locations
Then when a person chooses Doctors, url is going to be www.abc.com/about_us/doctors.html
I wish to change it out to www.abc.com/doctors.html
You may create a concealed menu having a position known as doctors and connect to it in the second-level products of the primary menu.