array-chunk.php

<?php 
$args = array(
	'post_type'		=> 'post_type',
	'post_status'		=> 'publish',
	'ignore_sticky_posts'	=> 1,
	'posts_per_page' 	=> 24,
	'orderby' 		=> 'date',
	'order' 		=> 'desc',
);

global $post;
$custom_query = get_posts($args ); 
$chunked_posts = array_chunk( $custom_query, 6 );
?>

<?php foreach ( $chunked_posts as $custom_post ) : ?>
	<div class="ost-group-of-2">
					
	<?php foreach( $custom_post as $post ) : setup_postdata( $post ); ?>
		<div class="thepost">
			<a id="post1" href="#"><?php the_title(); ?></a>
 			<p id="description1"><?php echo $post->post_content; ?></p>
		</div>

	<?php endforeach; ?>
	</div>

<?php endforeach; ?>