But you have the filtering working?
As far as the repeating tags, do you mean this part of your code is?
<ul id="filters" class="filter-menu">
<?php while ( $postlist->have_posts() ) : $postlist->the_post(); ?>
<?php $posttags = get_the_tags();
echo '<li><a href="#" class="active" data-filter="*">Alles</a></li>';
if ($posttags) {
foreach($posttags as $tag) {
echo '<li><a href="#" data-filter="' . '.' . $tag->name . '">' . $tag->name . '</a></li>';
}
}
?>
<?php endwhile; ?>
</ul>
