0) { $slider_cat_ids[$i] = $cat_id; } } if ( count($slider_cat_ids) > 0) { $slider_query = new WP_Query( 'cat=' . implode(',', $slider_cat_ids) . '&posts_per_page=-1&orderby=date&order=DESC&id=slider' ); if ( $slider_query->have_posts() ) { ?>