--- a/src/pyams_default_theme/features/header/skin/templates/simple-header.pt	Wed Jul 18 01:57:10 2018 +0200
+++ b/src/pyams_default_theme/features/header/skin/templates/simple-header.pt	Wed Jul 18 01:57:25 2018 +0200
@@ -1,7 +1,7 @@
 <div class="header header-simple"
 	 tal:define="settings view.settings" i18n:domain="pyams_default_theme">
 	<tal:var replace="structure provider:pyams.banner" />
-	<ul class="nav nav-tabs" role="tablist">
+	<ul class="nav nav-pills margin-bottom-20" role="tablist">
 		<tal:loop repeat="link settings.tabs.get_visible_items(request)">
 			<li role="presentation"
 				tal:attributes="class 'active' if view.is_active(link) else ''">