/**
	* Checks for single template by category
	* Check by category slug and ID
	*/
	foreach((array)get_the_terms($post->ID,'taxonomy_name') as $cat) :

		if(file_exists(SINGLE_PATH . '/single-cat-' . $cat->slug . '.php'))
			return SINGLE_PATH . '/single-cat-' . $cat->slug . '.php';

		elseif(file_exists(SINGLE_PATH . '/single-cat-' . $cat->term_id . '.php'))
			return SINGLE_PATH . '/single-cat-' . $cat->term_id . '.php';

As currently its just for default categories…

Thanks

function pa_category_top_parent_id ($catid) {

 while ($catid) {
  $cat = get_category($catid); // get the object for the catid
  $catid = $cat->category_parent; // assign parent ID (if exists) to $catid
  // the while loop will continue whilst there is a $catid
  // when there is no longer a parent $catid will be NULL so we can assign our $catParent
  $catParent = $cat->cat_ID;
 }

return $catParent;
}

//-----------------------------------------------------------
//funcion para mostrar un single template para cada categoria
/**
* Define a constant path to our single template folder
*/
define(SINGLE_PATH, TEMPLATEPATH . '/single');

/**
* Filter the single_template with our custom function
*/
add_filter('single_template', 'my_single_template');

/**
* Single template function which will choose our template
*/
function my_single_template($single) {
	global $wp_query, $post;

/**
	* Checks for single template by category
	* Check by category slug and ID
	*/
	foreach((array)get_the_category() as $cat) :

		$categoriapadre= pa_category_top_parent_id ($cat);

		if(file_exists(SINGLE_PATH . '/single-cat-' . $cat->term_id . '.php'))
			return SINGLE_PATH . '/single-cat-' . $cat->term_id . '.php';

		elseif(file_exists(SINGLE_PATH . '/single-cat-' . $categoriapadre . '.php'))
			return SINGLE_PATH . '/single-cat-' . $categoriapadre . '.php';	

	endforeach;
return $single;

}

Thanks

I’m trying to make this work on twentyten theme. I cant seem to make it work.

Here’s the code:

/* Define a constant path to our single template folder */
define(SINGLE_PATH, TEMPLATEPATH . '/single');

/* Filter the single_template with our custom function*/
add_filter('single_template', 'my_single_template');

/* Single template function which will choose our template*/
function my_single_template($single) {
    global $wp_query, $post;

/* Checks for single template by post type */
if ($post->post_type == "POST TYPE NAME"){
    if(file_exists(SINGLE_PATH . '/single-' . $post->post_type . '.php'))
        return SINGLE_PATH . '/single-' . $post->post_type . '.php';
}

/* Checks for single template by category. Check by category slug and ID */
foreach((array)get_the_category() as $cat) :

    if(file_exists(SINGLE_PATH . '/single-cat-' . $cat->slug . '.php'))
        return SINGLE_PATH . '/single-cat-' . $cat->slug . '.php';

    elseif(file_exists(SINGLE_PATH . '/single-cat-' . $cat->term_id . '.php'))
        return SINGLE_PATH . '/single-cat-' . $cat->term_id . '.php';

endforeach;

/*Checks for default single post files within the single folder */
if(file_exists(SINGLE_PATH . '/single.php'))
    return SINGLE_PATH . '/single.php';

elseif(file_exists(SINGLE_PATH . '/default.php'))
    return SINGLE_PATH . '/default.php';

return $single;
}

and just replace “POST TYPE NAME” with your custom post type name.

How would I modify the code above to maintain the category specific single post templates while also enabling the single post type ones?