How to creat a nested list from an array PHP -

i have list of awards i'd group , list year. i'm able list items, have been unsuccessful in nesting them.

/////array

array ( [0] => array     (         [award] => array             (                 [id] => 5                 [order] => 4                 [publish] => 1                 [year] => 2015                 [title] => test award #5                 [copy] => duis aute irure dolor in reprehenderit.                 [slug] => test-award-5             )      )  [1] => array     (         [award] => array             (                 [id] => 4                 [order] => 3                 [publish] => 1                 [year] => 2014                 [title] => test award #4                 [copy] => duis aute irure dolor in reprehenderit.                 [slug] => test-award-4             )      )  [2] => array     (         [award] => array             (                 [id] => 1                 [order] => 0                 [publish] => 1                 [year] => 2013                 [title] => test award #1                 [copy] => duis aute irure dolor in reprehenderit.                 [slug] => test-award-1             )      )  [3] => array     (         [award] => array             (                 [id] => 2                 [order] => 1                 [publish] => 1                 [year] => 2013                 [title] => test award #2                 [copy] => duis aute irure dolor in reprehenderit.                 [slug] => test-award-2             )      )  ) 

////controller

class awardsrecognitioncontroller extends appcontroller {  var $name = 'award';  /*****     public *****/ function index(){     $awards=$this->award->find('all', array(           'conditions'=>array('publish'=>1),           'order'=>array('award.year desc')        ));         $this->set('awards', $awards);  } 

////view

    <div id="award_container">  <?php     echo "<ul>";      foreach($awards $award){         echo "              <li class='award' style='color:black;'>                  <strong>".$award['award']['year']."</strong>                  <span class='award_title'>".$award['award']['title']."</span>                  <p>".$award['award']['copy']."</p>             </li>          ";     }  ?> </div> 

what trying output data nested list this.

2015     test award #5 2014     test award #4 2013     test award #2     test award #1 

any welcomed! thanks!

$array = [your existing array];  $n = array(); foreach($array $a) {     $year = $a['award']['year'];     if(!isset($n[$year])) { $n[$year] = array(); }     $n[$year][] = $a['award']; }  // have new array $n looking  print_r($n);  ksort($n); // sort array key  // , can walk through  foreach($n $year => $awards) {     echo $year."<br>";     foreach($awards $aw) {         echo $aw['title']."<br>";     } }