http://forum.xda-developers.com/show....php?t=2534671 is one of the nicest themes I've seen...and I use it on my Note 3. My girlfriend LOVES it, but she's got the AT&T S4, which, quite frankly, has nothing but pretty standard and flat themes. This more 3D theme is awesome and I was wondering if there's anyone that wouldn't mind a quick port to the S4. Any help would be appreciated!!! Thank you!
The link you post says thanks to someone for letting them use their S4 theme. So it looks like the theme your linking is a port from an S4 theme to begin with : http://forum.xda-developers.com/show....php?t=2372902
Because its for the 9505 (which is essentially the same as the 337, as in runs the same hardware. the 9500 is the eyxnos one) it should run just fine.
HOWEVER because there could be small differences in the apk's between the variants i recommend getting the 3mint build associated to the android version her rom has and using 3mint framework instead.
Check the link it has all the required files to get it up and running.