A naive urlview replacement for opening multiple URLs with mutt. Stands on the shoulders of skim.
After enabling in mutt (see below) run by hitting the corresponding keybinding, enable multiple selection with <Tab>.
Something like the following in your muttrc should do the trick, which binds to <Ctrl>+b, same as urlview:
macro index,pager \cb "<pipe-message> leth<Enter>" "call leth to extract URLs out of a message"
macro attach,compose \cb "<pipe-entry> leth<Enter>" "call leth to extract URLs out of a message"
urlscan is overall a more capable URL selector.