getActiveChildren($id=0, $sort='menuindex', $dir='ASC', $fields='id, pagetitle, description, parent, alias, menutitle')
is the function definition. So you'll need to do this:
getActiveChildren($node, , , 'id, pagetitle, description, parent, alias, menutitle, hidemenu')
Then after line 49,
foreach ($globalKids as $kid){
put the whole inner foreach block in an if block:
if($kid['hidemenu'] == 0) {
$output .= '<li';
$output .= ($kid['id']==$sectionId)? ' class="LGlob_active"' : '' ;
$output .= '><a href="[~'.$kid['id'].'~]" ';
$output .= 'title="'.$kid['pagetitle'].'">';
$output .= $kid['pagetitle'].'</a></li>';
$globalCount++;
}
That should do the trick.