function laydatacongty($idl)
{
$lhang = new LoaiHang();
$cty = new CongTy();
$lhang->set_idloai($idl);
return $lhang->listcongty();
}
<div id="main">
<div id="left">
<h1>Sản Phẩm</h1>
<ul id="verticalmenu">
<?php
require_once 'libraries/oop.php';
require_once 'libraries/loaihang.php';
require_once 'libraries/hanghoa.php';
$a = new LoaiHang();
$data = $a->listloaihang();
foreach ($data as $item) {
echo "<li><a href='index.php?module=hanghoa&act=lhhloai&idloai={$item['idLoaiHang']}'>{$item['TenLoai']} </a>";
echo "<ul>";
$a->set_idloai($item['idLoaiHang']);
$datact = $a->listcongty();
foreach ($datact as $itemct) {
echo "<li><a href='index.php?module=hanghoa&act=lhhcongty&idcongty={$itemct['idCongTy']}'>{$itemct['TenCongTy']}</a></li>";
}
echo "</ul>";
echo "</li>";
}
?>
</ul>
<div class="timkiem">
<form action="index.php?module=tim&act=tim" method="post" >
<input type="text" name="txttim" size="19" /><br />
<input type="submit" name="ok" value="Tìm" style="margin-left:50px;" />
</form>
</div><!-- close div tim kiem -->
<?php
ini_set("display_errors", 0);
require_once '../../../libraries/oop.php';
require_once '../../../libraries/loaihang.php';
require_once '../../../libraries/congty.php';
$idloai = $_GET['idloai'];
$loaihang = new LoaiHang();
$loaihang->set_idloai($idloai);
$data_congty = $loaihang->listcongty();
echo "<option value='-1'>----Chọn----</option>";
foreach ($data_congty as $item_congty) {
?>
<option value='<?php
echo $item_congty['idCongTy'];
?>
'><?php
echo $item_congty['TenCongTy'];
?>
</option> <?php
}
?>
