WP: Templates for specific category archive pages. Just use category-catSlug.php or *category-catID.php*. Or for more customization, use the code below. (not for Hybrid theme)

category template

// Just use category-catSlug.php or *category-catID.php*, no code necessary. 
// Or for more customization, use the code below.

// add to functions.php:

/* Template for certain categories (archive pages, not single) */
add_filter( 'category_template', 'my_category_template' );
// easy to apply to other templates as well ?
 
function my_category_template( $template ) {

  if( is_category( 1 ) ) // categories by ID
  $template = locate_template( array( 'template_id_A.php', 'category.php' ) );

  elseif( is_category( array( 21, 32 ) ) ) // We can search for multiple categories by ID by passing an array
  $template = locate_template( array( 'template_id_B.php', 'category.php' ) );

  elseif( is_category( 'food' ) ) // We can search for categories by their slug
  $template = locate_template( array( 'template_slug_A.php', 'category.php' ) );

  elseif( is_category( array( 'music', 'movies' ) ) ) // We can search for multiple categories by slug as well
  $template = locate_template( array( 'template_slug_A.php', 'category.php' ) );

  return $template;
}