Just say that if you cut them, they would unravel, and they're waaay toooo beeeeeaaaauutiful for them to just unravel. Tell him she'll wear them as a scarf when it gets cold, and then stick them somewhere deep in a drawer. Or better yet, if your husband is still stationed during the winter, have her put them on for a few minutes and send him some pictures of her in the scarves. I'm sure that would make him happy.
Or, if you really need to make something, take the scarf and sew the opposite ends so you have a big ring. Gather one side, slap some elastic on, and viola, a skirt. Then have her wear it for two minutes, take a photo, send.....heh. Then stick it in a drawer.