website_less/views/website_backend_navbar.xml

<openerp>
    <data>

<template id="website_less.user_navbar" inherit_id="website.user_navbar">
    <xpath expr="//ul[@class='dropdown-menu' and @role='menu']" position="replace">
        <ul class="dropdown-menu" role="menu">
            <li id="html_editor"><a href="#advanced-view-editor" data-action='ace'>HTML Editor</a></li>
            <li id="theme_customize"><a href="#">Customize Theme</a></li>
            <li id="install_apps"><a href="/web#return_label=Website&amp;action=website.action_module_website">Install Apps</a></li>
            <li class="divider"></li>
        </ul>
    </xpath>
</template>

    </data>
</openerp>