currency_switcher | Convert currencies using exchange rates from http | Predictive Analytics library

I've inherited some php that deals with a dropdown select and need to make one small change: to move the label so that it becomes the default dropdown placeholder (instead of the first option). I could modify the php file, but it may receive an automated update at some point, and then I'd have to modify it again. Instead, I'd like to use jquery to move the label. I've searched the forums and have not quite been able to find what I'm looking for and get it to work.

The code I have inherited looks similar to this;