Вот код с примером Fotorama
<div class="fotorama" data-loop="true" data-nav="thumbs" data-arrows="true" data-click="true"
data-swipe="true" data-allowfullscreen="true" trackpad="true" data-auto="true" data-fit="scaledown"
data-allowfullscreen="native" >
<?php $images = acf_photo_gallery('photos', $post->ID);
if (count($images)): ?>
<?php foreach ($images as $image): ?>
<a href="<?php echo $image['full_image_url']?>"><img src="<?php echo
$image['thumbnail_image_url']?>" alt="<?php the_title()?>"></a>
<?php endforeach; ?>
<?php endif; ?>
<!-- тут фото карточки-->
</div>
