Drop down menu with list_pages

I’m looking to create a dropdown menu (as in a <select> menu) with a list of pages from the current hierarchy level. At present I’ve got it in an unordered list using list_pages (see https://is.quotebox.org/sports/football/villarreal/ ) but can’t seem to utilise that function to create a select dropdown menu instead.

The code I’m currently utilising can be found here:
https://pastebin.com/ZmRYRdgS

Is there any way for the code list_pages generates to be changed, to output option tags instead of the usual li tags, and to strip out any other unnecessary classes?

Thanks