Thanks for the link. But that doesn’t replace your created “Classes” and posttype “wcs3_class” in wp-admin to what I want.
If I use the solution posted in your link, I am able to access that class page http://streetdancemaastricht.nl/wcs3_class/spinning/ like http://streetdancemaastricht.nl/lessen/spinning/ but it doesn’t feel right. I want to totally replace that wcs3_class name.
If I check the source of http://streetdancemaastricht.nl/lessen/spinning/ then the canonical tag is again pointing to /wcs3_class/spinning
Thanks in advance!