<?php
    $query = new WP_Query( array('post_type' => 'home_blocks', 'posts_per_page' => -1 ) );
    while ( $query->have_posts() ) : $query->the_post(); ?>
        <div class="item">
            <h2><?php the_title(); ?></h2>

            <a href="<?php echo get_post_meta($post->ID, "_block_url", true); ?>" title="<?php the_title(); ?>"><?php the_post_thumbnail( 'full' ); ?></a>

        </div>
    <?php endwhile; ?>