Alphabetize Sidebar Links

I’ve been building a theme off of a blank/stripped WordPress theme. By default it looks as though links in the sidebar are NOT alphabetized, and I can not figure out how to alphabetize them.

I found a solution for sorting category links, but what I want to sort are POST listings.

I can not provide a URL since this is on a local host, but I have a “Locations” page where each location is a different post; these posts are listed in the sidebar of the Locations page. I would like the locations to be alphabetized in the left sidebar, but instead they are sorted in the order in which I added them. Is there a way to alphabetize those links?

Please and thank you!