reactjs - How to insert a `React` component after a child element? -

i trying create react component , insert after child element. here markup.

<li class="dropdown">   <a href="#" class="dropdown-toggle" data-toggle="dropdown">other <b class="caret"></b>   </a> </li> 

i want insert react component after <a> tag, not child of <a> tag. here want like.

<li class="dropdown">   <a href="#" class="dropdown-toggle" data-toggle="dropdown">other <b class="caret"></b>   </a>   <ul ... react component>    </ul> </li> 

here code adds component:

react.rendercomponent(new navbardropdown(), this.$el.find('what goes here').get(0)); 

i not want add div id place into, how add react component in location?

react needs render component onto something. place placeholder div there.