Index: C:/Xampp/htdocs/development/subversion/wordpress/wp-admin/admin-functions.php
===================================================================
--- C:/Xampp/htdocs/development/subversion/wordpress/wp-admin/admin-functions.php	(revision 3548)
+++ C:/Xampp/htdocs/development/subversion/wordpress/wp-admin/admin-functions.php	(working copy)
@@ -580,7 +580,7 @@
 			$result[$cat]['children'] = get_nested_categories($default, $cat);
 			$result[$cat]['cat_ID'] = $cat;
 			$result[$cat]['checked'] = in_array($cat, $checked_categories);
-			$result[$cat]['cat_name'] = get_the_category_by_ID($cat);
+			$result[$cat]['cat_name'] = apply_filters('list_cats', get_the_category_by_ID($cat), $cat);
 		}
 	}
 
Index: C:/Xampp/htdocs/development/subversion/wordpress/wp-includes/template-functions-category.php
===================================================================
--- C:/Xampp/htdocs/development/subversion/wordpress/wp-includes/template-functions-category.php	(revision 3548)
+++ C:/Xampp/htdocs/development/subversion/wordpress/wp-includes/template-functions-category.php	(working copy)
@@ -48,6 +48,7 @@
 	if ( '' == $separator ) {
 		$thelist .= '<ul class="post-categories">';
 		foreach ( $categories as $category ) {
+			$category->cat_name = apply_filters('list_cats', $category->cat_name, $category);
 			$thelist .= "\n\t<li>";
 			switch ( strtolower($parents) ) {
 				case 'multiple':
@@ -70,6 +71,7 @@
 	} else {
 		$i = 0;
 		foreach ( $categories as $category ) {
+			$category->cat_name = apply_filters('list_cats', $category->cat_name, $category);
 			if ( 0 < $i )
 				$thelist .= $separator . ' ';
 			switch ( strtolower($parents) ) {
Index: C:/Xampp/htdocs/development/subversion/wordpress/wp-includes/template-functions-general.php
===================================================================
--- C:/Xampp/htdocs/development/subversion/wordpress/wp-includes/template-functions-general.php	(revision 3548)
+++ C:/Xampp/htdocs/development/subversion/wordpress/wp-includes/template-functions-general.php	(working copy)
@@ -232,7 +232,7 @@
 function single_cat_title($prefix = '', $display = true ) {
 	$cat = intval( get_query_var('cat') );
 	if ( !empty($cat) && !(strtoupper($cat) == 'ALL') ) {
-		$my_cat_name = get_the_category_by_ID($cat);
+		$my_cat_name = apply_filters('list_cats', get_the_category_by_ID($cat), $cat);
 		if ( !empty($my_cat_name) ) {
 			if ( $display )
 				echo $prefix.strip_tags($my_cat_name);