snippet_latest_posts/views/options.xml

<?xml version="1.0" encoding="utf-8" ?>
<openerp>
  <data>

    <template id="s_latest_posts_place_in_tab" inherit_id="website_less.snippets">
      <xpath expr="//div[@id='snippet_feature']" position="inside">
        <t t-snippet="snippet_latest_posts.s_latest_posts" t-thumbnail="/snippet_latest_posts/static/src/img/s_latest_posts.jpg"/>
        <t t-snippet="snippet_latest_posts.s_latest_posts_big_picture" t-thumbnail="/snippet_latest_posts/static/src/img/s_latest_posts_big_picture.jpg"/>
      </xpath>
    </template>

    <!-- Snippet's Options -->
    <template id="s_latest_posts_option" inherit_id="website_less.snippet_options">
      <xpath expr="//div[@data-js='blog-style']" position="before">

        <div data-js='js_get_posts' data-selector=".js_get_posts" />
        
        <div data-js='js_get_posts_selectBlog' data-selector=".js_get_posts">
          <li class="dropdown-submenu">
            <a tabindex="-1" href="#">Limitado por Blogs</a>
            <ul class="dropdown-menu">
              <li data-filter_by_blog_id="0"><a>Todos los Blogs</a></li> 
              <!-- the blogs' list will be generated in js -->
            </ul>
          </li>
        </div>

        <div data-js='js_get_posts_limit' data-selector=".js_get_posts">
          <li class="dropdown-submenu">
            <a tabindex="-1" href="#">Limitar por Cantidad...</a>
            <ul class="dropdown-menu">
              <li data-posts_limit="1"><a>1 post</a></li> 
              <li data-posts_limit="2"><a>2 posts</a></li>  
              <li data-posts_limit="3"><a>3 posts</a></li>
              <li data-posts_limit="4"><a>4 posts</a></li>
              <li data-posts_limit="5"><a>5 posts</a></li>
              <li data-posts_limit="6"><a>6 posts</a></li>
              <li data-posts_limit="7"><a>7 posts</a></li>
              <li data-posts_limit="8"><a>8 posts</a></li>
              <li data-posts_limit="9"><a>9 posts</a></li>
              <li data-posts_limit="10"><a>10 posts</a></li>
            </ul>
          </li>
        </div>

      </xpath>         
    </template>


</data>
</openerp>