Probably, not.
The format of the menu file is very simple. Lines that start with anything but space or tab are considered entries for the menu (in order to be able to use it like a hot key, the first character should be a letter). All the lines that start with a space or a tab are the commands that will be executed when the entry is selected. But MC allows you to make multiple menu entries with same shortcut and title, so you can make a menu entry that looks like separator and does nothing, like:
a hello echo world - -------- b world echo hello - -------- c superuser ls / This will look like:
