php - How to order the links of different pages in cakephp -

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i trying figure out how links should composed in order useful. in cakephp make new pages , links each other . soemthing.com/places/catergory want appear places/category/{name of place}/{id of service type}

so in controller in cake php wrote 

     public function category($city){        $data = array('place' => $city);     $this -> set('services',$this -> service -> find('all', array('conditions' => array('service.place' => $city))));     $this -> set($data);      }

but not working, has idea this, need , new cake php pretend answering beginner.

something this

public function category($city=null,$type=null){     $conditions = array('service.place' => $city,'service.type' => $type);     $services = $this -> service -> find('all', array('conditions' => $conditions)));     $this -> set(compact('services','city'); }

routes.php

router::connect('/places/category/*', array('controller'=>'services','action'=>'category'));

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