php-遍历数组，根据mark值的不同，使数据显示在不

有这样一个数组$jobArr

$jobArr=array(  1 =>     array(      0 =>         array(          'name' =>  '产品经理1',          'desc' =>  '广州' ,          'mark' =>  'group:1' ),      1 =>         array          ( 'name' =>  '产品经理1',           'desc' =>  '广州' ,          'mark' =>  'group:1'),      2 =>         array          ( 'name' =>  '产品经理1',          'desc' =>  '广州' ,          'mark' =>  'group:1') ),  2 =>     array (      0 =>         array (          'name' =>  '产品经理2' ,          'desc' =>  '广州' ,          'mark' =>  'group:2'),      1 =>         array (          'name' =>  '产品经理2' ,          'desc' =>  '广州' ,          'mark' =>  'group:2')),  3 =>     array (      0 =>         array (          'name' =>  '产品经理3' ,          'desc' =>  '广州' ,          'mark' =>  'group:3' ),      1 =>         array (          'name' =>  '产品经理3' ,          'desc' =>  '广州' ,          'mark' =>  'group:3')));

         if($jobArr[$index]){            foreach($jobArr[1] as $post){                $jobList2 .= <<                    {$post['name']}                    {$post['desc']}                html;        }            foreach($jobArr[2] as $post){                $jobList3 .= <<                {$post['name']}                {$post['desc']}            html;            }            foreach($jobArr[3] as $post){                $jobList4 .= <<                {$post['name']}                {$post['desc']}            html;            }        }

在这里我遍历了三次，然后放在这三个p中，很麻烦，怎么遍历一次就可以将数据分类放在这几个p中呢？

 { $jobList2} 
  { $jobList3}
     { $jobList4}