php foreach仅与dynamica数据循环一次

class temp 
{
var $file;

function get_file($temp){
$this->file = get_file_contents($temp)
return $this->file;
}

function new_list($forum_list)
{
    foreach($forum_list as $key => $value)
    {
        $this->file = str_replace(\'{\'.$key.\'}\', $value, $this->file);
    }
    return $this->file;
}

function display()
{
    echo $this->file;
}
}

 $temp = new temp();

$temp->get_file(\'file.html\');

mysql_select_db($database_config, $config);
$query_cat = \"SELECT * FROM category ORDER BY dsp ASC\";
$cat = mysql_query($query_cat, $config) or die(mysql_error());

while ($row_cat = mysql_fetch_array($cat)){
    $temp->new_list(array(
        \'CAT_TITLE\' => $row_cat[\'title\'],
        \'CAT_DESCRIPTION\' => $row_cat[\'description\']));

    $cid = $row_cat[\'id\'];


mysql_select_db($database_config, $config);
$query_cat = \"SELECT * FROM subcategory WHERE cid={$cid}\";
$subcat = mysql_query($query_subcat, $config) or die(mysql_error());

    while ($row_subcat = mysql_fetch_array($subcat)){
        $temp->new_list(array(
            \'SUBCAT_TITLE\' => $row_subcat[\'title\'],
            \'SUBCAT_DESCRIPTION\' => $row_subcat[\'description\']));
    }
}
$temp->display();