编辑时，蛋糕php清除字段

I want if someone click on edit button , all fields can show but the 1 specific fields details should be hidden how can i adjust in this command line , cake php 2

echo $this->Form->input('contact');

There are 2 solutions

1st put an empty value to this form on view side.

> echo $this->Form->input('contact' array('value' => '');

2nd Solution is from model controlers unset the default value which is auto filling the forms

unset($this->request->data['Company']['contact']);