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>