edit

usa questa funzione

edit
codice:
function test ( $prova ) {

     $x = 0;

     for ($i=0;$i<=count($prova);$i++) {

          $var = $prova[$i]; 

          if ($var != '') {

               foreach ( $var as $k => $v ) {

                    $out[$x][$k] = $v;

               }

               $x++;

         }

         $var = '';
		 
     }
	 
     return $out;
}

$prova = test ( $prova ) ;