If you want to options group properties in OpenERP(Odoo) follow the below mentioned code in your .xml file: -

<template id="snippet_demo_opt" name="Snippet demo Options" inherit_id="website_less.snippet_options">
  <xpath expr="//div[@data-js='background']" position="after">
    <div data-selector=".snippet_demo"> <!-- Options group -->
      <li class="dropdown-submenu">
        <a href="#">Your Option</a>
        <ul class="dropdown-menu"> <!-- Options list -->
          <li data-select_class="opt_shadow"><a>Shadow Images</a></li>
          <li data-select_class="opt_grey_bg"><a>Grey Bg</a></li>
          <li data-select_class=""><a>None</a></li>
        </ul>
      </li>
    </div>
  </xpath>
 </template>