title: Is it possible to horizontally center align a row of bootstrap spans that don't add up to 12?
body: <pre><code>&lt;div class="row"&gt;
    &lt;div class="span4"&gt;&lt;/div&gt;
    &lt;div class="span4"&gt;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I understand that you need 12 spans in total. Is there a way to still center align the two spans I have horizontally? The above will just float to the left.</p>
  
  <p>I've tried putting a wrapper around them and margin auto'ng it but nothing happens.</p>
  
  <p>I can go and remove the span class and just add a specified width but I need <code>span</code> class for fluid layout.</p>