title: CKEditor and Code parsing - strange change after submitting "<?" code
body: <p>If I try, to write <code>"&lt;?"</code> code into my CKEditor, it will be transformed into</p>
  
  <pre><code>&lt;p&gt;&amp;lt;? lol&lt;/p&gt;
  </code></pre>
  
  <p>It's OK. But if I submit my form and page is reloaded I will see:</p>
  
  <pre><code>&lt;p&gt;&lt;!--? lol&lt;/p--&gt;&lt;/p&gt;
  </code></pre>
  
  <p>Any idea?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>Changed data are after page with form is reloaded with new submitted data.</p>
  
  <p>The only one solution I tried is to instead "<code>&lt;?</code>" write <code>@@</code> and in my template it replaces back to <code>&lt;?</code>. I want it to write php codes as text in my articles. But this is not the best solution.</p>