isotop portfolio dynamic - wp

<div class="mix-item-menu text-center">
<?php
    $all_cats = get_terms('portfolio_cat');
    if ( !empty($all_cats) && ! is_wp_error($all_cats) ) {
        $cats = $all_cats;
    }
    foreach ($cats as $cat) :
?>
<button data-filter=".<?php echo $cat->slug; ?>" class=""><?php echo $cat->name; ?></button>
<?php endforeach; ?>
</div>

----------------------------------

<?php

$project_cats = get_the_terms( get_the_ID(), 'portfolio_cat' );

if ( $project_cats && ! is_wp_error( $project_cats ) ) {

    $project_cat_list = array();

    foreach ( $project_cats as $cat ) {
        $project_cat_list[] = $cat->name;
    }

    $project_all_cats = join( " ", $project_cat_list);
 }
else {
$project_all_cats = '';
}

?>