Nice feature Azzid.
The code will give a syntax error because this line:
<xen:if is="{$user.trophy_points} >= 130" />
Should be:
<xen:if is="{$user.trophy_points} >= 130" >
To go right before the Members tab, It should look like this:
<xen:if is="{$tabs.members}">
<li class="navTab members {xen:if $tabs.members.selected, 'selected', 'Popup PopupControl PopupClosed'}">
<a href="http://mylabnotebook.org/events"...
Try replacing the {$tabs.events.href} in your code to the actual page url such as "http://yoursite.com/events"
Place it after the tab you want it to follow...if you want it to appear after forums, find the <!--forum--!> tab code and paste your code after it.
When it comes to hiding tabs on the nav bar, the only tutorials I found were how to hide the Members/Help tab.
So in order to hide other tabs, simply treat them as Members tabs.
First:
DL this resource which automatically hides your Members tab from guests...