This should be cleaner code no reason for an else in there.
Code:
$tabselected = '';
$tablinks = '';
if (THIS_SCRIPT == 'script1' OR THIS_SCRIPT == 'script2')
{
$vbulletin->options['selectednavtab']='unique_name';
$tabselected = ' class="selected"';
$tablinks = '<ul class="floatcontainer">
<li><a href="link1.php">Link 1</a></li>
<li><a href="link2.php">Link 2</a></li>
</ul> ';
}
$template_hook['navtab_middle'] .= '
<li '.$tabselected.' class="popupmenu">
<a href="javascript://" class="popupctrl navtab">Members</a>
<ul class="popupbody popuphover">
<li><a style="text-indent: 0px; color:#000000" href="link1.php">Link 1</a></li>
<li><a style="color:#000000" href="link2.php">Link 2</a></li>
</ul>
'.$tablinks.'</li>
';