Contao: Include Modul Filter in regular navigation

gistfile1.php

<?php

// Include CEs or Modules into the navigation list.

$arrPageFilters = array(
  // Page-ID => FilterModule-ID / or FilterContent-ID
  23 => 33
);

?>

<ul class="<?php echo $this->level; ?>">
<?php foreach ($this->items as $item): ?>
<?php if ($item['isActive']): ?>
<li class="active<?php if ($item['class']): ?> <?php echo $item['class']; ?><?php endif; ?>"><span class="active<?php if ($item['class']): ?> <?php echo $item['class']; ?><?php endif; ?>"><?php echo $item['link']; ?></span>
<?php
// Einziger Mod im Original-Template
if(array_key_exists($item['id'], $arrPageFilters))
{
  echo $this->getFrontendModule($arrPageFilters[$item['id']]);
  #echo $this->getContentElement($arrPageFilters[$item['id']]);
}

?>
<?php echo $item['subitems']; ?></li>
<?php else: ?>
<li<?php if ($item['class']): ?> class="<?php echo $item['class']; ?>"<?php endif; ?>><a href="<?php echo $item['href']; ?>" title="<?php echo $item['pageTitle'] ? $item['pageTitle'] : $item['title']; ?>"<?php if ($item['class']): ?> class="<?php echo $item['class']; ?>"<?php endif; ?><?php if ($item['accesskey'] != ''): ?> accesskey="<?php echo $item['accesskey']; ?>"<?php endif; ?><?php if ($item['tabindex']): ?> tabindex="<?php echo $item['tabindex']; ?>"<?php endif; ?><?php if ($item['nofollow']): ?> rel="nofollow"<?php endif; ?><?php echo $item['target']; ?>><?php echo $item['link']; ?></a><?php echo $item['subitems']; ?></li>
<?php endif; ?>
<?php endforeach; ?>
</ul>