i don’t understand what you mean, the thread i linked to was indeed about the tree menu 
In that thread was a post describing how to filter out pages based on template (or some other feature unique to them). Something like this:
<?php foreach($subpages->visible()->filterBy('template', '!=', 'newsarticle') as $p): ?>
newsarticle is the name of your news template. See here for more, and the post below at that describes filtering on more then one template if you need to.