Filter to simple template minik2

Hi,
i'm trying to add a filter to the simple template like the one for the portfolio template.
I found a custom plugin to filter items in masonry on github (github.com/dynamick/multiple-filter-masonry)

I'm almost there, but i'm not able to hide the duplicate value from the filter.
Here my demo page to better understand: lastrada.genuetic.com/index.php/cosa-facciamo

And here my code to build the "filter"
<div class="btn-toolbar filters">
<?php
$numofitems = count($items);
if($numofitems)
{
foreach ($items as $key=>$item)
{
?>
<div data-toggle="buttons" class="btn-group">
<label class="btn btn-default">
<input type="checkbox" value="<?php echo $item->categoryalias; ?>" >
<?php echo $item->categoryname; ?>
</label>

</div>
<?php } ?>

<div class="clr"></div>

<?php } ?>
</div>

Actually not yet!
I have included the code manually for categories that I need, but if I add a category I have to add the new button. It 's just a temporary solution.

I tried to add my code here, but I think it is not possible in this forum.

No response from the creators of this wonderful module.

I tried, but I can't understand how categories are generated in portfolio mode.
In default.php of portfolio mode i only found the 'filter' tag divs, but empty. I think the categories are generated by some java script that I can't found.

Hello,
I'd also like to add the categories filter from the portfolio style into the masonry style of this module. Have anyone found a sollution? Thanks!