子分类使用父分类模板

 function f_category_template($template){
	$category = get_queried_object();
	if($category->parent !='0'){
		while($category->parent !='0'){
			$category = get_category($category->parent);
		}
	}
	
	$templates = array();
 
	if ( $category ) {
		$templates[] = "category-{$category->slug}.php";
		$templates[] = "category-{$category->term_id}.php";
	}
	$templates[] = 'category.php';
	return locate_template( $templates );
}