cats

<?php
/**
 * Template Name: Category TEST NEW
 *
 * @package WordPress
 * @subpackage Twenty_Eleven
 * @since Twenty Eleven 1.0
 */

get_header(); ?>

        <section id="primary">
            <div id="content" role="main">
<?php
$all_cats = array( 4,5,6,7,8,16 ); //manual category list
foreach( $all_cats as $cat ) {

$latest_post = new WP_Query( array( 'posts_per_page' => 1, 'category__in' => array( $cat ) ) );
$category = get_category($cat); //get category title
if( $latest_post->have_posts() && $category ) : ?>
<h2 class="category-title"><?php echo $category->name; ?></h3>

<?php while( $latest_post->have_posts() ) : $latest_post->the_post(); ?>

            <?php get_template_part( 'content', get_post_format() ); ?>

<?php endwhile;
else : echo '<p>no post</p>';
endif; wp_reset_postdata();
}
?>
            </div><!-- #content -->
        </section><!-- #primary -->

<?php get_footer(); ?>