Hi,
I found the answer to my problem. I was trying to get the the_field when the listing_link is a sub_field.
<?php if(get_sub_field('listing_link' ,$ik)): ?>
<a href="<?php the_sub_field('listing_link'); ?>">
<?php endif; ?>
<div class="blok-low">
<div class="lt">
<?php $attachment_idiconlist = get_sub_field('listing_icon');
$sizeiconlist = "practicesublisticonimage"; // (thumbnail, medium, large, full or custom size)
$imageiconlist = wp_get_attachment_image_src( $attachment_idiconlist, $imageiconlist);
?>
<img src="<?php echo $imageiconlist[0]; ?>" alt="" />
</div>
<div class="txt">
<?php the_sub_field('listing_heading');?>
</div>
</div>
<?php echo (get_sub_field('listing_link', $ik)) ? '</a>' : '';?>
