You don't need to pass $data to the helpers: see the blog tutorial edit
action:
function edit($id = null)
{
if (empty($this->data))
{
$this->Post->id = $id;
$this->data = $this->Post->read();
}
else
{
if ($this->Post->save($this->data['Post']))
{
$this->flash('Your post has been updated.','/posts');
}
}
}
You always have $this->data at controller, then in your helper
(including the html helper) you can do
$value=$this->Html->tagValue($fieldname)
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