title: CodeIgniter validating drop down menu
body: <p>How would I write in CodeIgniter, if option equals "Select" Throw an error saying that selecting an option is required?</p>
  
  <pre><code>&lt;option&gt;Select&lt;/option&gt;
  &lt;option&gt;Option 1&lt;/option&gt;
  &lt;option&gt;Option 2&lt;/option&gt;
  &lt;option&gt;Option 3&lt;/option&gt;
  &lt;option&gt;Option 4&lt;/option&gt;
  </code></pre>
  
  <p>Many thanks in advance.</p>