Disclaimer: I’m neither a WordPress guru nor a PHP expert. This is what it is, a dirtly little hack, otherwise I’d have called it an “enhancement”
Now onto the main things.
Aim: You would have used wp_list_pages (or plugins like dd-list-subpages, that use it) to display a list of your pages/subpages on a particular page. [...]
Tags: custom fields, description, Hack, list of pages, pages, PHP, start_el, subpages, Walker, wordpress, wp_list_pages