You can use postLink method of FormHelper .
In view file ,you should use:
echo $this->Form->postLink('Delete',
array('action' => 'delete', $list['Memberlist']['id']),
array('class'=>'btn-mini btn', 'confirm' => 'Are you sure?'));
In the Controller,use following code:
public function delete($id) {
if($this->request->is('get')) {
throw new MethodNotAllowedException();
}
$this->Memberlist->id = $id;
if (!$this->Memberlist->exists()) {
throw new NotFoundException(__('Invalid list.'));
}
if ($this->Memberlist->delete()) {
$this->Session->setFlash(__('List deleted.'), 'success');
return $this->redirect(array('action'=>'index'));
}
$this->Session->setFlash(__('List was not deleted.'), 'error');
return $this->redirect(array('action'=>'index'));
}