In my html the ckeditor automaticly removed my custom html code. I am solved this issue here . 

Update your script where you declear the ck editor at bottom .

<script src="https://cdn.ckeditor.com/4.15.1/standard/ckeditor.js"></script>

<script>

     //CKEDITOR.replace( 'long_desc' );

       CKEDITOR.replace( 'long_desc', {

    allowedContent: true,

} );

</script>

#ckEditor #htmlEditor