Sorry Here`s the code, Thanx in advanced.
<?php
$args = array(
'post_parent' => $post->ID,
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => 'ASC',
'orderby' => 'menu_order',
'numberposts' => 4,
'post_status' => null,
);
$attachments = get_children($args);
if ( $attachments ) :
foreach ( $attachments as $attachment ) :
?>
<div class="uk-width-small-1-2 uk-width-medium-1-4 id-<?php echo $post->ID; ?>">
<a href="<?php echo $attachment->guid; ?>" data-uk-lightbox="{group:'post-id-<?php echo $post->ID; ?>'}">
<?php echo wp_get_attachment_image( $attachment->ID, 'small-thumbnail', false );; ?>
</a>
</div>
<?php
endforeach;
endif;
?>
