diff --git a/includes/Skin.php b/includes/Skin.php
index 140e6ade872..65b16d31dcd 100644
--- a/includes/Skin.php
+++ b/includes/Skin.php
@@ -430,34 +430,33 @@ END;
 			# get a big array of the parents tree
 			$parenttree = $wgTitle->getParentCategoryTree();
 
-			# Render the array as a serie of links
-			# Need to give skin cause $this is undefined at this level
-			function walkThrough ($tree, &$skin) {
-				$return = '';
-				foreach($tree as $element => $parent) {
-					if(empty($parent)) {
-						# element start a new list
-						$return .= '<br />';
-					} else {
-						# grab the others elements
-						$return .= walkThrough($parent, $skin);
-					}
-					# add our current element to the list
-					$eltitle = Title::NewFromText($element);
-					if(!empty($parent)) $return .= ' &gt; ';
-					$return .=  $skin->makeLinkObj( $eltitle, $eltitle->getText() ) ;
-				}
-				return $return;
-			}
-
 			# Skin object passed by reference cause it can not be
 			# accessed under the method subfunction walkThrough.
-			$s .= walkThrough($parenttree, $this);
+			$s .= Skin::drawCategoryBrowser($parenttree, $this);
 		}
 
 		return $s;
 	}
 
+	# Render the array as a serie of links
+	function drawCategoryBrowser ($tree, &$skin) {
+		$return = '';
+		foreach ($tree as $element => $parent) {
+			if (empty($parent)) {
+				# element start a new list
+				$return .= '<br />';
+			} else {
+				# grab the others elements
+				$return .= Skin::drawCategoryBrowser($parent, $skin);
+			}
+			# add our current element to the list
+			$eltitle = Title::NewFromText($element);
+			if (!empty($parent)) $return .= ' &gt; ';
+			$return .=  $skin->makeLinkObj( $eltitle, $eltitle->getText() ) ;
+		}
+		return $return;
+	}
+
 	function getCategories() {
 		$catlinks=$this->getCategoryLinks();
 		if(!empty($catlinks)) {