echo stripslashes($_POST["filter"]);
?>
">
<input type="submit" name="filter_cats" value="Filter">
</form>

<form method="post" action="<?php 
echo $PHP_SELF;
?>
?id=<?php 
echo $_GET["id"];
?>
">
<select name="category_select" style="width:650px;margin: 10px 0px;display:block;clear:both;" size="16">
	<?php 
echo $biz->listCategories();
?>
	</select>

<input type="submit" name="submit" value="Submit">
<input type="hidden" name="category_number" value="<?php 
echo $_POST["category_number"];
?>
">
<input type="hidden" name="filter" value="<?php 
echo $_POST["filter"];
?>
">

</form>