How to display text in Textarea of wmd-editor

Question

I want to display text in the Textarea of wmd-editor . The text I will display in the Textarea has already been written by wmd-editor (like a Reverse operation) from HTML to Textarea of wmd-editor, but when I try to do this using

<div id="wmd-preview" >{!! $question->qst_body !!}</div>

then I get this result :

but I want to get this result :

any ideas ? thanks