"global_start" equiv. for CMS ?

[XManuX]

I've set a hook in global_start to tell which tab is selected. For now i don't use any conditional structures, just a plain :

PHP Code:

$vbulletin->options['selectednavtab'] = 'TESTINGMOD'; 


for testing purposes.

In my navbar template, i have the following :

<vb:if condition="$vboptions['selectednavtab'] == 'TESTINGMOD'">
			<li class="selected"><a class="navtab" href="http://boardurl/content.php/114">section1</a></li>
		<vb:else />	
			<li><a class="navtab" href="http://boardurl/content.php/114">section1</a></li>
		</vb:if>

But it is only working in the forums, which leads me to think that "global_start" is only working inside the forums area...

Question : what is the equivalent of "global_start" for CMS ?