how to prevent CKEditor from make changes to the html

we are pasting HTML inside the ckeditor by switching the view to source view ,
but when it loads again it look like some modification happen to the original html ,
how can disable modification on the code


source code :

 <h1>Redoe Group</h1>
<p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin rhoncus convallis adipiscing. Aenean sagittis luctus pretium. Aenean vitae convallis sem. Quisque at mi lectus. Mauris non felis justo.</p>

<a class="redoemold" href="/page/mold">
<img style="width: 262px; height: 198px;" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fmold.jpg/262/198/w" alt="ReDoe Mold" />
<img style="width: 262px; height: 36px;" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fttl_redoe_mold.png/262/36/w" alt="ReDoe Mold" />
   <ul>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
   </ul>
</a>

<a class="redoetech" href="/page/tech">
<img style="width: 262px; height: 198px;" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2ftech.jpg/262/198/w" alt="ReDoe Tech">
<img style="width: 262px; height: 36px;" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fttl_redoe_tech.png/262/36/w" alt="ReDoe Technologies">
   <ul>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
   </ul>
</a>

<a class="redoetnd" href="/page/tnd">
<img style="width: 262px; height: 198px;" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2ftnd.jpg/262/198/w" alt="ReDoe Tool and Die">
<img style="width: 262px; height: 36px;" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fttl_redoe_tnd.png/262/36/w" alt="ReDoe Tool and Die">
   <ul>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
      <li>
         Lorem ipsum dolor sit amet</li>
   </ul>
</a>

after switchng to to view mode the code becomes like this :

<h1>
   Redoe Group</h1>
<p>
   Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin rhoncus convallis adipiscing. Aenean sagittis luctus pretium. Aenean vitae convallis sem. Quisque at mi lectus. Mauris non felis justo.</p>
<p>
   <a class="redoemold" href="/page/mold"><img alt="ReDoe Mold" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fmold.jpg/262/198/w" style="width: 262px; height: 198px" /> <img alt="ReDoe Mold" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fttl_redoe_mold.png/262/36/w" style="width: 262px; height: 36px" /> </a></p>
<ul>
   <li>
      <a class="redoemold" href="/page/mold">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoemold" href="/page/mold">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoemold" href="/page/mold">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoemold" href="/page/mold">Lorem ipsum dolor sit amet</a></li>
</ul>
<p>
   <a class="redoetech" href="/page/tech"><img alt="ReDoe Tech" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2ftech.jpg/262/198/w" style="width: 262px; height: 198px" /> <img alt="ReDoe Technologies" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fttl_redoe_tech.png/262/36/w" style="width: 262px; height: 36px" /> </a></p>
<ul>
   <li>
      <a class="redoetech" href="/page/tech">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoetech" href="/page/tech">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoetech" href="/page/tech">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoetech" href="/page/tech">Lorem ipsum dolor sit amet</a></li>
</ul>
<p>
   <a class="redoetnd" href="/page/tnd"><img alt="ReDoe Tool and Die" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2ftnd.jpg/262/198/w" style="width: 262px; height: 198px" /> <img alt="ReDoe Tool and Die" src="/ThumbGen.ashx?%2fcontent%2fimages%2fredoe%2fttl_redoe_tnd.png/262/36/w" style="width: 262px; height: 36px" /> </a></p>
<ul>
   <li>
      <a class="redoetnd" href="/page/tnd">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoetnd" href="/page/tnd">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoetnd" href="/page/tnd">Lorem ipsum dolor sit amet</a></li>
   <li>
      <a class="redoetnd" href="/page/tnd">Lorem ipsum dolor sit amet</a></li>
</ul>

is there any config option to disable the rewrite of the source html