diff --git a/materio_search_api.module b/materio_search_api.module
index 001493c7..859fc3e0 100755
--- a/materio_search_api.module
+++ b/materio_search_api.module
@@ -684,6 +684,8 @@ function materio_search_api_advanced_search_form($form, &$form_state){
   //  dsm($form_state, 'form_state');
   // dsm($form, 'form');
   // global $user;
+  $as_tree = materio_serach_api_get_advancedsearch_tree();
+  dsm($as_tree, 'as_tree');
 
   $keys = arg();
   $path = array_shift($keys);
@@ -702,18 +704,15 @@ function materio_search_api_advanced_search_form($form, &$form_state){
     )
   );
 
-  $vocabularies = variable_get('advancedsearchvocs', array());
-
   $form['slider'] = array(
     '#type' => 'fieldset',
     // '#title' => $voc->name,
     '#tree' => true,
   );
 
-  foreach ($vocabularies as $vid) {
-    // dsm($vid, "vid");
+  foreach ($as_tree as $vid => $tree) {
 
-    $voc = taxonomy_vocabulary_load($vid);
+    // $voc = taxonomy_vocabulary_load($vid);
     // dsm($voc, 'voc');
 
     $form['slider']['voc-'.$vid] = array(
@@ -722,25 +721,10 @@ function materio_search_api_advanced_search_form($form, &$form_state){
       '#tree' => true,
     );
 
-    $tree = taxonomy_get_tree($vid, 0, 1, TRUE);
-    // dsm($tree, 'tree');
-
-    if(!count($tree))
-      continue;
-
     foreach ($tree as $term) {
-      // dsm($term, "term");
+      // dsm($term, 'term');
 
-      if($term->field_used_on_advanced_search['und'][0]['value'] == 0)
-       continue;
-
-      $children = taxonomy_get_children($term->tid, $vid);
-      // dsm($children, "children");
-
-      if(!count($children))
-       continue;
-
-      $form['slider']['voc-'.$vid]['tree-'.$term->tid] = array(
+      $form['slider']['voc-'.$vid]['tree-'.$term['tid']] = array(
         '#type' => 'fieldset',
         // '#title' => $term->name,
         '#attributes' => array("class"=>array("treelevel1")),
@@ -748,9 +732,9 @@ function materio_search_api_advanced_search_form($form, &$form_state){
       );
 
       $placeholder = t("Select an option");
-      $form['slider']['voc-'.$vid]['tree-'.$term->tid]['children'] = array(
+      $form['slider']['voc-'.$vid]['tree-'.$term['tid']]['children'] = array(
         '#type' => 'select',
-        '#title' =>  $term->name,
+        '#title' =>  $term['name'],
         '#attributes' => array(
           "class"=>array("treelevel1"),
           "title"=>$placeholder,
@@ -762,37 +746,19 @@ function materio_search_api_advanced_search_form($form, &$form_state){
       );
 
       $options = array();
-      foreach ($children as $tid => $child) {
-        $child = taxonomy_term_load($child->tid);
-        // dsm($child, 'child');
-        if($child->field_used_on_advanced_search['und'][0]['value'] == 0){
-         continue;
-        }
+      foreach ($term['children'] as $tid => $child) {
 
-        // $children2 = taxonomy_get_children($child->tid, $vid);
-        $children2 = taxonomy_get_children_all($child->tid, $vid);
-        // dsm($children2, "children2");
+        $options[$tid] = $child['name'];
 
-        if(!count($children2))
-          continue;
-
-        $options[$tid] = $child->name;
-
-        $classes2 = array("treelevel2", $child->tid);
+        $classes2 = array("treelevel2", $child['tid']);
 
         $options2 = array();
         $dflt_values2 = array();
-        foreach ($children2 as $tid2 => $child2) {
-          $child2 = taxonomy_term_load($tid2);
-          if($child2->field_used_on_advanced_search['und'][0]['value'] == 0)
-           continue;
-
-          $options2[$tid2] = $child2->name;
-
+        foreach ($child['children'] as $tid2 => $child2) {
+          $options2[$tid2] = $child2['name'];
           // default Values
           if(in_array($tid2, $default_keys))
             $dflt_values2[] = $tid2;
-
         }
 
         if(count($options2)){
@@ -800,14 +766,14 @@ function materio_search_api_advanced_search_form($form, &$form_state){
           if(count($dflt_values2))
             $classes2[] = 'visible';
 
-          $form['slider']['voc-'.$vid]['tree-'.$term->tid]['tid-'.$child->tid] = array(
+          $form['slider']['voc-'.$vid]['tree-'.$term['tid']]['tid-'.$child['tid']] = array(
             '#type' => 'select',
-            '#title' => $child->name,
+            '#title' => $child['name'],
             '#multiple' => true,
             '#attributes' => array(
               "class" => $classes2, // , "form-control"
               "title" => "-Please select-",
-              "tid" => $child->tid,
+              "tid" => $child['tid'],
             ),
             '#theme_wrappers' => array('materio_search_api_form_element'),
             // '#empty_option' => '-Please select-',
@@ -818,9 +784,9 @@ function materio_search_api_advanced_search_form($form, &$form_state){
         }
       }
       if(count($options)){
-        $form['slider']['voc-'.$vid]['tree-'.$term->tid]['children']['#options'] = $options;
+        $form['slider']['voc-'.$vid]['tree-'.$term['tid']]['children']['#options'] = $options;
       }else{
-        unset($form['slider']['voc-'.$vid]['tree-'.$term->tid]);
+        unset($form['slider']['voc-'.$vid]['tree-'.$term['tid']]);
       }
     }
 
@@ -837,6 +803,67 @@ function materio_search_api_advanced_search_form($form, &$form_state){
   return $form;
 }
 
+function materio_serach_api_get_advancedsearch_tree(){
+  $as_tree = array();
+  $vocabularies = variable_get('advancedsearchvocs', array());
+
+  foreach ($vocabularies as $vid) {
+    // dsm($vid, "vid");
+
+    // $voc = taxonomy_vocabulary_load($vid);
+    // dsm($voc, 'voc');
+
+    $tree = taxonomy_get_tree($vid, 0, 1, TRUE);
+    // dsm($tree, 'tree');
+
+    if(!count($tree)) continue;
+
+    foreach ($tree as $term) {
+      // dsm($term, "term : ".$term->name);
+
+      if(!isset($term->field_used_on_advanced_search['und'][0]['value'])
+        || $term->field_used_on_advanced_search['und'][0]['value'] == 0)
+       continue;
+
+      $children = taxonomy_get_children($term->tid, $vid);
+      // dsm($children, "children");
+
+      if(!count($children)) continue;
+
+      foreach ($children as $tid => $child) {
+        $child = taxonomy_term_load($child->tid);
+        dsm($child, 'child : '.$child->name);
+        if($child->field_used_on_advanced_search['und'][0]['value'] == 0)
+         continue;
+
+        // $children2 = taxonomy_get_children($child->tid, $vid);
+        $children2 = taxonomy_get_children_all($child->tid, $vid);
+        // dsm($children2, "children2");
+
+        if(!count($children2)) continue;
+
+        foreach ($children2 as $tid2 => $child2) {
+          $child2 = taxonomy_term_load($tid2);
+          // dsm($child2, 'child2 : '.$child2->name);
+          if(!isset($child2->field_used_on_advanced_search['und'][0]['value'])
+            || $child2->field_used_on_advanced_search['und'][0]['value'] == 0)
+           continue;
+
+          $as_tree[$vid][$term->tid]['children'][$child->tid]['children'][] = array('tid'=>$child2->tid,'name'=>$child2->name);
+        }
+
+        if(isset($as_tree[$vid][$term->tid]['children'][$child->tid]['children']))
+          $as_tree[$vid][$term->tid]['children'][$child->tid] += array("tid"=>$child->tid,"name"=>$child->name);
+      }
+
+      if(isset($as_tree[$vid][$term->tid]['children']))
+        $as_tree[$vid][$term->tid] += array("tid"=>$term->tid,"name"=>$term->name);
+    }
+  }
+
+  return $as_tree;
+}
+
 function taxonomy_get_children_all($tid, $vid = 0, $key = 'tid'){
   $c = taxonomy_get_children($tid, $vid, $key);
   $result = array();
diff --git a/materio_search_api.pages.inc b/materio_search_api.pages.inc
index 830db04b..3de2fb6f 100755
--- a/materio_search_api.pages.inc
+++ b/materio_search_api.pages.inc
@@ -139,6 +139,7 @@ function materio_search_api_results_search(){
     // }
     $typed = implode(' +', $keys);
   }else{
+    $advanced = false;
     $typed = implode('/', $keys);
   }