Change how categories expand

[z0rr0]

I have this custom made categories tree,but I want to make a little modification to it.When I click on the main categorie I want it to expand (like it is now) but don't go to any page ( just expand and only when I click on subcategorie it will load the page).

Here is the address www.cumparaturi4all.ro

 

PS: here is code of my categories:

 

<?   // ---- CATEGORIES

 function tep_show_category($counter) {
global $tree, $categories_string, $cPath_array;

  if(!$tree[$counter]['level']){			   

  $categories_string .= $categories_string ? '<tr><td height=5 colspan=2></td></tr>' : '';			 

$categories_string .= '<tr><td width=15 ></td><td width=185><img src=images/m17.gif  align=absmiddle>  <a class=ch2  href=';

if ($tree[$counter]['parent'] == 0) {
  $cPath_new = 'cPath=' . $counter;
} else {
  $cPath_new = 'cPath=' . $tree[$counter]['path'];
}
$categories_string .= tep_href_link('index.php', $cPath_new) . '>';
// display categry name
$categories_string .= $tree[$counter]['name'];
$categories_string .= '</a><br>';

  }else{  // SUBCATEGORY

$categories_string .= '    ';

for($i=0;$i<$tree[$counter]['le vel'];$i++)
 $categories_string .= '   ';

$categories_string .= '   <img src=images/m17.gif  align=absmiddle> <a class=m123 href=';   
if ($tree[$counter]['parent'] == 0) {
  $cPath_new = 'cPath=' . $counter;
} else {
  $cPath_new = 'cPath=' . $tree[$counter]['path'];
}
$categories_string .= tep_href_link('index.php', $cPath_new) . '>';
// display category name
$categories_string .= $tree[$counter]['name'];
$categories_string .= '</a><br>';
  }  

if ($tree[$counter]['next_id'] != false) {
  tep_show_category($tree[$counter]['next_id']);
}  
 }



 define(TABLE_CATEGORIES, "categories");
 define(TABLE_CATEGORIES_DESCRIPTION, "categories_description");
 $categories_string = '';
 $tree = array();

 $categories_query = tep_db_query("select c.categories_id, cd.categories_name, c.parent_id from " . TABLE_CATEGORIES . " c, " . TABLE_CATEGORIES_DESCRIPTION . " cd where c.parent_id = '0' and c.categories_id = cd.categories_id and cd.language_id='" . (int)$languages_id ."' order by sort_order, cd.categories_name");
 while ($categories = tep_db_fetch_array($categories_query))  {
$tree[$categories['categories_id']] = array('name' => $categories['categories_name'],
											'parent' => $categories['parent_id'],
											'level' => 0,
											'path' => $categories['categories_id'],
											'next_id' => false);

if (isset($parent_id)) {
  $tree[$parent_id]['next_id'] = $categories['categories_id'];
}

$parent_id = $categories['categories_id'];

if (!isset($first_element)) {
  $first_element = $categories['categories_id'];
}
 }

 //------------------------
 if ($cPath) {
$new_path = '';
reset($cPath_array);
while (list($key, $value) = each($cPath_array)) {
  unset($parent_id);
  unset($first_id);
  $categories_query = tep_db_query("select c.categories_id, cd.categories_name, c.parent_id from " . TABLE_CATEGORIES . " c, " . TABLE_CATEGORIES_DESCRIPTION . " cd where c.parent_id = '" . (int)$value . "' and c.categories_id = cd.categories_id and cd.language_id='" . (int)$languages_id ."' order by sort_order, cd.categories_name");
  if (tep_db_num_rows($categories_query)) {
	$new_path .= $value;
	while ($row = tep_db_fetch_array($categories_query)) {
	  $tree[$row['categories_id']] = array('name' => $row['categories_name'],
										   'parent' => $row['parent_id'],
										   'level' => $key+1,
										   'path' => $new_path . '_' . $row['categories_id'],
										   'next_id' => false);

	  if (isset($parent_id)) {
		$tree[$parent_id]['next_id'] = $row['categories_id'];
	  }

	  $parent_id = $row['categories_id'];

	  if (!isset($first_id)) {
		$first_id = $row['categories_id'];
	  }

	  $last_id = $row['categories_id'];
	}
	$tree[$last_id]['next_id'] = $tree[$value]['next_id'];
	$tree[$value]['next_id'] = $first_id;
	$new_path .= '_';
  } else {
	break;
  }
}
 }
 $categories_string .=  '';
 tep_show_category($first_element); 
 $categories_string .=  '';

 echo $categories_string;
?>