title: jquery datatable is not filtering rows from ssp formatted fields. e.g
body: <pre><code>$columns = array(
  array( 'db' =&gt; 'id', 'dt' =&gt; 0 ),
  array( 'db' =&gt; 'name', 'dt' =&gt; 1 ),
  array( 
      'db'        =&gt; 'id',
      'dt'        =&gt; 2,
      'formatter' =&gt; function( $id, $row ) {
          if($id % 2 == 0){
              return &quot;Even&quot;;  
          } 
          else{ 
              return &quot;Odd&quot;; 
          } 
      }
   ),
  array( 'db' =&gt; 'office',  'dt' =&gt; 3 )
  </code></pre>
  <p>i can filter rows from id and name fields but not from odd and even field.</p>