A change source code in /templates/default/category.php. I add the class to the sub category title

<h2> <a class="subCategoryTitle" href="<?php echo $subCategory->link; ?>"> <?php echo $subCategory->name; ?>

 

But it is nothing changing on the site. What cause may be? May files to be cached? 

I fined troubles. Files of templates is coping to the current template folder. I wondering that nothing say so simple thing. This forum is useless.