使用自定义模板的Wordpress用于子类别和其中的帖子

Question

There is a big common category Catalog ( $category->cat_ID = 2 ). It contains a few sub-categories like Series1 , Series2 and so on. Every sub-category contains a few sub-sub-categories like Type1 , Type2 , etc. And every sub-sub-category contains some products (type post ).
I don't need to show common category Catalog and its sub-categories, but I need to show sub-sub-category with its products on individual pages.
How to set 404.php template for category Catalog and its sub-categories and custom templates for every sub-sub-categories (with list of products) and for every product?

I have found code below ( functions.php file)

function catalog_template() {    
// Get the category id from global query variables
$cat = get_query_var('cat');

if(!empty($cat)) {    

    // Get the detailed category object
    $category = get_category($cat);

    // Check if it is sub-category and having a parent, also check if the template file exists
    if( ($category->parent != '0') && ($category->parent == '2') && (file_exists(TEMPLATEPATH . '/catalog.php')) ) { 

        // Include the template for sub-catgeory
        include(TEMPLATEPATH . '/catalog.php');
        exit;
    }
    return;
}
return;

}
add_action('template_redirect', 'catalog_template');

but I don't know how to customize it for my needs.

UPD. I've written the code below

function catalog_template() {    
// Get the category id from global query variables
$cat = get_query_var('cat');

if(!empty($cat)) {    
    $catalog_id = get_cat_ID('Catalog');

    $catalog_child_cats = array();

        foreach(get_all_category_ids() as $child_cat)
        {
            if(get_category($child_cat)->parent==$catalog_id)
            {
                $catalog_child_cats[]=$child_cat;
            }
        }

    // Get the detailed category object
    $category = get_category($cat);
    $cat_parent_id = $category->cat_ID;

    // Check if it is sub-category and having a parent, also check if the template file exists
    if( (in_array($cat_parent_id, $catalog_child_cats)) && (file_exists(TEMPLATEPATH . '/catalog.php')) ) { 

        // Include the template for sub-sub-catgeory
        include(TEMPLATEPATH . '/catalog.php');
        exit;
    }
    return;
}
return;

}
add_action('template_redirect', 'catalog_template');

but it uses catalog_template for sub-categories too. How to set 404.php for common category Catalog and for its sub-categories?

UPD2 I've found a mistake in my code, it needs to be

// Get the detailed category object
    $category = get_category($cat);
    $cat_parent_id = $category->category_parent;

Answer 1

I would recommend against using a 404, as that implies something different, and specific; the content is not there or is unavailable, not the content is a child of this taxonomy.

BUT, if you wanted to..... Just copy the code from your 404.php and nest it in a conditional statement that queries the category + 1 level down. Something like this:

if( is_category('Catalog') ){ $this_category = get_queried_object(); if( 0 != $this_category->parent ){ // code from 404.php } }