默认情况下，没有选项为特定类别的帖子设置特定模板。尽管如此，这并不意味着它不能做到。要实现这一点，您需要使用single_template filter 将自定义单模板页面设置为具有特定类别集的帖子。

您可以尝试以下操作：(CAVEAT: 该代码未经测试，至少需要PHP 5.3）

add_filter( \'single_template\', function ( $template ) 
{
    // Get the current queried post id
    $current_post = get_queried_object_id();

    // Get the post terms. Change category to the correct taxonomy name if your post terms is from a custom taxonomy
    $terms = wp_get_post_terms( $current_post, \'category\' );

    // Check if we have terms and we don\'t have an error. If we do, return default single template
    if ( !$terms || is_wp_error( $terms ) )
        return $template;

    // Check if our custom template exists before going through all the trouble to find out terms
    $new_template = locate_template( \'single-custom.php\' );
    if ( !$new_template ) 
        return $template;

    // Get al the term ids in an array and check if we can find our parent term
    $term_ids = wp_list_pluck( $terms, \'term_id\' );
    if ( in_array( 10, $term_ids ) )
        return $template = $new_template;

    // Get all the parent ids in an array and look for our parent term if we could not find it using term ids
    $parent_ids = wp_list_pluck( $terms, \'parent\' );
    if ( in_array( 10, $parent_ids ) )
        return $template = $new_template;

    // If we cannot find the parent or direct children, lets look for lower level children
    $bool = false;
    foreach ( $term_ids as $term ) {
        // Use get_ancestors and check if we can find our parent term id
        if ( in_array( 10, get_ancestors( $term, \'category\' ) ) ) {
            $bool = true;
            // If we found our parent, stop execution of our foreach loop
            break;
        }
    }

    // If $bool is true, return our custom single template
    if ( $bool )
        return $template = $new_template;

    // If all our conditions failed, return the default single template
    return $template;
});