diff --git a/sai/modules/saimod_sys_docu/tpl/saimod_sys_docu_cat.tpl b/sai/modules/saimod_sys_docu/tpl/saimod_sys_docu_cat.tpl
index 904b18c..a622b73 100644
--- a/sai/modules/saimod_sys_docu/tpl/saimod_sys_docu_cat.tpl
+++ b/sai/modules/saimod_sys_docu/tpl/saimod_sys_docu_cat.tpl
@@ -1,5 +1,5 @@
 <div class="tabbable tabs-left" id="tabs2_docu">
-    <ul class="nav nav-tabs">
+    <ul class="nav nav-stacked nav-pills col-md-3">
         ${tabopts}
     </ul>
     <div class="tab-content">
diff --git a/sai/modules/saimod_sys_docu/tpl/tab.tpl b/sai/modules/saimod_sys_docu/tpl/tab.tpl
index 61a942b..424d0fb 100644
--- a/sai/modules/saimod_sys_docu/tpl/tab.tpl
+++ b/sai/modules/saimod_sys_docu/tpl/tab.tpl
@@ -1,6 +1,6 @@
 <div class="tab-pane ${active}" id="tab_${tab_id}">    
     <div class="tabbable tabs-left subtabs">
-      <ul class="nav nav-tabs">
+      <ul class="nav nav-stacked nav-pills col-md-3">
         ${menu}
       </ul>
       <div class="tab-content">