Setting a condition in a static CMS page to display correct sub-menu

[Lloyd32552]

I've created a new Navbar tab named Software using a Plugin and a static page that displays (correctly) when I click on that tab. There is also a sub-menu that will display if it finds the string define('THIS_SCRIPT', 'software_navtab'); in the static page. Somehow, I need to embed this string into the php file, but I don't know how to do that since it is created as content.

I posted this at vbulletin.com and was told that it should be posted here, but I was told that I shouldn't use THIS_SCRIPT for this process. What would be an alternate way of setting or determining a condition that would be recognized by the Plugin?