index.php：

    public function index()
    {
        $sql=db('users')
        ->field('rtime')
        ->select();
        foreach($sql as $val)
        {
            $a[]=date('m',strtotime($val['rtime']));
        }
        $this->assign('data',$a);
        return $this->fetch('index');
    }
 

index.html：

        {foreach $data as $val}
		{$val}
	{/foreach}