/ Custom post type for products on sale and links-page
add_action('init', 'create_posttype');
function create_posttype() {
  register_post_type( 'sale',
      array(
          'labels' => array(
              'name' => __( 'Sale' ),
              'singular_name' => __( 'Sale' )
          ),
          'public' => true,
          'has_archive' => true,
          'rewrite' => array('slug' => 'sale'),
          'taxonomies' => array('category', 'sale')
      ),
      register_post_type( 'links',
          array(
              'labels' => array(
                  'name' => __( 'Links' ),
                  'singular_name' => __( 'Links' )
              ),
              'public' => true,
              'has_archive' => true,
              'rewrite' => array('slug' => 'links'),
              'supports' => array( 'title', 'editor', 'custom-fields' )
          )
  ));
}