$related .= '<div class="related-post-date">' . do_shortcode( '[post_date]' ) . '</div>';

$related .= '<div class="related-post-tags">' . do_shortcode( '[post_tags before="Tags: "]' ) . '</div>';

$related .= '<div class="related-post-categories">' . do_shortcode( '[post_categories before="Categories: "]' ) . '</div></div>';