Convert the content of a form from Markdown to HTML

Hi !

In my app I have a simple form :

<div class='centered'><h1 style="margin-bottom: 20px;">Add an article</h1></div>

<?php

echo $this->Form->create('Post', array(

'class' => 'form', 

'inputDefaults' => array(

   'div' => 'control-group',

   'label' => false,

   'between' => '<div class="controls">',

   'after' => '</div>',

   'error' => array('attributes' => array('wrap' => 'div', 'class' => 'alert alert-error'))

) ));

echo $this->Form->input('title',array(

'style' => 'width:490px', 

'before' => '<span class = \'control-label\'>Title</span>'));

echo $this->Form->input('body',array(

'style' => 'width:490px', 

'rows' => '15', 

'placeholder' => '<p>Please use HTML syntax</p>',

'before' => '<span class = \'control-label\'>Content</span>'));

echo $this->Form->input('format', array(

    'options' => array('standard' => 'Standard post', 'link' => 'Link post')));

echo ("<input type='submit' class='btn' value='Publish'>"); ?>

<a class="btn btn-danger" href="<?php echo $this->Html->url('/'); ?>">Cancel</a>

I want the user to be able to enter body as markdown syntax, but to be converted to html and stored in the database.

I've downloaded it from http://michelf.com/projects/php-markdown/ and the help file says :

    include_once "markdown.php";

    $my_html = Markdown($my_text);

So I guess I have to use :

App::import('Vendor', 'markdown/markdown');

But where do I put this and how can I change my form so only the body input area is converted from Markdown to html ?

Thanks a lot !

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