Returns a label tag tailored for labelling an input field for a
specified attribute (identified by $method) on an object assigned to the
template (identified by $objectName).
The text of label will default to the attribute name unless you specify
it explicitly. Additional options on the label tag can be passed as a
hash with $options. These options will be tagged onto the HTML as an
HTML element attribute as in the example shown.
Examples:
$this->label('post', 'title');
=>
$this->label('post', 'title', 'A short title')
=>
$this->label('post', 'title', 'A short title',
array('class' => 'title_label'));
=>