I'm working on a redesign of 4 related sites, which I didn't build. We just launched the main site, and then found a ton of broken links, which were fine in the old site. (Link checker running on both.)
In all instances, the problem is that the link is site.com/child but neees to be site.com/parent/child.
Look at one of the old sites, I see that the menu does go to site.com/parent/child, but if I put in site.com/child, it redirects to site.com/parent/child.
How are they making this happen on the old sites, so I can implement it on the new sites?
I suspect there's some checkbox somewhere that I've missed, but I've not found any plug-ins running that I don't have on the new site, and the permalinks settings match, so I don't know where else to look.
Thanks in advance!