Hi,
I actually solved it by making an array and then check for duplicate custom fields, like so:
<?php
$args = array(
'post_type' => 'deals'
);
$the_query = new WP_Query($args);
$unieke_deals = array();
if ($the_query->have_posts()):
while ($the_query->have_posts()):
$the_query->the_post();
$bedrijf = get_field('company');
if (!in_array($bedrijf, $unieke_deals)):
$unieke_deals[] = $bedrijf;
?>
<?php the_field('company'); ?>
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a><br />
<?php
endif;
endwhile;
endif;
?>
