This tip is for when, for instance, you want Children’s Ministry page to have a url like http://church.com/ministries/children instead of http://church.com/ministries/childrens-ministries.
While logged in, go to PAGES button in the user menu on left of site.
Click the name of the page you want to change the url of.
Change the text in the URL LINK NAME field to what you want it to be in the url.
Click the SAVE button at top right of page panel.