diff --git a/grammars/mediawiki.js b/grammars/mediawiki.js
index 25800db..bfacdba 100644
--- a/grammars/mediawiki.js
+++ b/grammars/mediawiki.js
@@ -293,6 +293,8 @@ mediawiki = rr.Parser({
   'main': rr.Node('wikidoc', rr.Sequence(
       rr.ZeroOrMore(rr.Ref('paragraph')),
       rr.EndOfText()))
-}, [
-  rr.SplitTagAndNest('bi', ['b', 'i'])
-]);
+}, {
+  'bi': [
+    rr.SplitTagAndNest('b', 'i')
+  ]
+});
diff --git a/recentrunes.js b/recentrunes.js
index 91fddae..1e18bd8 100644
--- a/recentrunes.js
+++ b/recentrunes.js
@@ -726,18 +726,15 @@ rr.SingleLineText = function() {
 
 
 /**
- * @param {string} originalName
- * @param {Array.<string>} newNames
+ * @param {...string} var_args
  * @return {rr.typeFilter}
  */
-rr.SplitTagAndNest = function(originalName, newNames) {
+rr.SplitTagAndNest = function(var_args) {
+  var hierarchy = Array.prototype.slice.call(arguments);
   return function(node) {
-    if (node.nodeName.toLowerCase() != originalName) {
-      return;
-    }
     var outerNode, innerNode;
-    for (var i = 0; i < newNames.length; i++) {
-      var newNode = document.createElement(newNames[i]);
+    for (var i = 0; i < hierarchy.length; i++) {
+      var newNode = document.createElement(hierarchy[i]);
       if (i == 0) {
         outerNode = innerNode = newNode;
       } else {
@@ -762,8 +759,9 @@ rr.SplitTagAndNest = function(originalName, newNames) {
  * @param {Object.<string, rr.typeFilter>} filters
  */
 rr.ApplyFilters = function(node, filters) {
-  for (var i = 0; i < filters.length; i++) {
-    filters[i](node);
+  var nodeFilters = filters[node.nodeName.toLowerCase()] || [];
+  for (var i = 0; i < nodeFilters.length; i++) {
+    nodeFilters[i](node);
   }
   for (var i = 0; i < node.childNodes.length; i++) {
     rr.ApplyFilters(node.childNodes[i], filters);