When using the Form helper to create a form, there are some options you can utilize to make your forms better.
Radio
The following form radio selection is named 'Radio name' and lists two options, 'label1' and 'label2', with 'label1' selected by default.
echo $this->Form->input('Radio name', array('type' => 'radio', 'legend' => false, 'options' => array('value1' => 'label1', 'value2' => 'label2'), 'default' => 'value1'));
Selection
The following form selection displays a select box with 4 directions and their corresponding single letter values and includes an empty first selection and a default selection of West.
$dirs = array('N' => 'North', 'E' => 'East', 'S' => 'South', 'W' => 'West');
echo $this->Form->input('street_dir', array('label' => __('Direction', true), 'type' => 'select', 'options' => $dirs, 'empty' => true, 'default' => 'W'));