Ticket #10676: category-template-10676.diff

category-template.php

@@ -871 +871 @@
                         $class = 'cat-item cat-item-' . $category->term_id;
                         if ( !empty($current_category) ) {
                                 $_current_category = get_term( $current_category, $category->taxonomy );
+                                $category_ancestors = array_reverse(get_ancestors($current_category, $category->taxonomy));
+                                
+                                if (in_array($category->term_id, $category_ancestors) && $hierarchical)
+                                        $class .= ' current-cat-ancestor';
+                                
                                 if ( $category->term_id == $current_category )
                                         $class .=  ' current-cat';
                                 elseif ( $category->term_id == $_current_category->parent )