Problem with reload HTML from a textaea

when I type this in the editor:

<a href="">test</a>

I got the transformed string on the server:

&lt;a href=""&gt;test&lt;/a&gt;

Very well!

But, when I output this transformed string in a textarea, and call the replaceTextArea() js function.
It became a real link in the fckeditor, not the original words I hoped.

And if I use the oEditor.create('instanceName', width, height, 'transformed string here'),it works ok.

How do I fix this?