JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css">
<script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js"></script>
<div id="deal_modal_body" class="modal-body">
   <div class="cb_inline_block">
      <div class="cb_inline_block"> Test: </div>
      <div class="cb_inline_block">
         <div class="input-append">
            <select id="id_">
               <option selected="selected" value="">---------</option>
            </select>
            <button id="add_button" class="btn" type="button"><icon class="icon-white">Go</icon></button>
         </div>
      </div>
   </div>
</div>

CSS

.cb_inline_block {
    display:inline-block;
}