title: CKEditor prevent removing id attribute
body: <p>in <code>CKEditor</code> i'm trying to prevent remove <code>id</code> attribute from html tags, such as:</p>
  
  <pre><code>&lt;p id='hello'&gt;Hello&lt;/p&gt;
  </code></pre>
  
  <p>but this configuration of ckeditor dont work and i can't find any other solution about this problem</p>
  
  <pre><code>&lt;script&gt;
      $(function () {
          CKEDITOR.replace('description', {
              allowedContent: true,
              autoGrow_onStartup: true,
              extraAllowedContent: '*[id]',
          });
      });
  &lt;/script&gt;
  </code></pre>
  
  <p>could you help me to resolve this problem?</p>