Laravel 4 Preview Form Submit - forms

Question

Any idea how to solve the following approach.
I have a form and want to display the entered data in a specific formtemplate before store it in the DB. If the entered data looks properly, the user can save the form.So I am searching for a way to display the entered data as a preview in a new window/tab first. With my code below I am not able to preview the form without saving the data in the databse. Also display the preview in a new window or tab is not possible. I guess there is no way to achieve this with php / laravel. I tried some onlick events, but no luck. As it seems like the route is prefered.
Any idea how to solve this?
My form looks like:
{{ Form::open(array('url' => 'backend/menubuilder/'.$id, 'method' => 'PUT'))}}
<section>
<div class="container">
<div class="row">
<div class="inputBox">
<div class="col-xs-12 col-md-6">
<h3>Montag</h3>
<div class="form-group">
{{Form::label('gericht_1_mo','Gericht 1')}}
{{Form::textarea('gericht_1_mo', Auth::user()->gericht_1_mo,array('class' => 'form-control'))}}
</div>
<div class="form-group">
{{Form::label('preis_1_mo','Preis', array('class' => 'col-md-6'))}}
{{Form::text('preis_1_mo', Auth::user()->preis_1_mo, array('class' => 'col-md-6'))}}
</div>
<div class="form-group mrgT55">
{{Form::label('gericht_2_mo','Gericht 2')}}
{{Form::textarea('gericht_2_mo', Auth::user()->gericht_2_mo,array('class' => 'form-control'))}}
</div>
<div class="form-group">
{{Form::label('preis_2_mo','Preis', array('class' => 'col-md-6'))}}
{{Form::text('preis_2_mo', Auth::user()->preis_2_mo, array('class' => 'col-md-6'))}}
</div>
</div>
</div>
</div>
</div>
</div>
{{Form::submit('update')}}
{{-- <input type="submit" name="preview" value="preview"> --}}
{{Form::close()}}
{{ Form::open(array('url' => 'backend/menubuilder/templatesview/'.$id, 'method' => 'POST'))}}
{{-- {{Form::submit('Preview',array('onClick' => 'target_blank'))}} --}}
<input onclick="newTab()" type="submit" name="preview" value="preview" >
{{Form::close()}}
My routes:
Route::get('backend/menubuilder/templates/{id}', 'MenuBuilderController#template');
Route::post('backend/menubuilder/templatesview/{id}', 'MenuBuilderController#preview');
My Controller:
public function preview($id)
{
$user = User::find($id);
$owner = (Auth::id() === (int) $id);
return View::make('backend/menubuilder/templatesview/tempone')->withUser($user)->withOwner($owner);
}
public function template($id)
{
$user = User::find($id);
$owner = (Auth::id() === (int) $id);
return View::make('backend/menubuilder/templates/tempone')->withUser($user)->withOwner($owner);
}