here is an example of working TinyMCE:
<!-- title field -->
<p>{{ Form::label('title', 'Tytuł') }}</p>
{{ $errors->first('title', '<div class="alert alert-error"><a class="close">×</a>:message</div>') }}
<p>{{ Form::text('title', $value = $post->title, $attributes = array(Input::old('title'))); }}</p>
<!-- body field -->
<p>{{ Form::label('body', 'Tekst') }}</p>
{{ $errors->first('body', '<div class="alert alert-error"><a class="close">×</a>:message</div>') }}
<p>{{ RTE::rich_text_box('body',$post->body,array('att'=>array('id'=>'editorID'),'selector'=>'editorSelector','mode'=>'full','setup'=>array('skin'=>'o2k7','skin_variant'=>'black'))) }}
</p>
<!-- submit button -->
<p>{{ Form::submit('Edit') }}</p>
the trick was to use it INSTEAD of Form::text (and change all file permissions in /laravel/public/bundles/* for 0755) the same thing was about CKEditor. hope it will help others in a future (: