Solved it by myself
<?php
$field = get_field_object('field_52385b5083a0d');
$value = get_field('field_52385b5083a0d');
$label = $field['choices'];
foreach( $label as $key => $value ){?>
<?php $test_meta = array(
'orderby' => 'id',
'order' => 'ASC',
'category' => $cat_id, //Get the current cat (Category.php)
'meta_key' => 'serien',
'meta_value' => $key,
'meta_compare' => 'LIKE'); // With the like i get a link from the meta-key-value to the sql-meta-value
$test_posts = get_posts( $test_meta);
if(count($test_posts) < 1){
}
else{
?>
