public function navigation($idsegm)
{
$dbtree = new dbtree(_DB_PREFIX_ . 'category', 'category', $this->db);
//Достаем категории 1-го уровня
$navigation = $dbtree->GetCategories(array('id_category', 'category_level', 'name', 'translit', 'pid'), 1);
//Перебираем категории 2-го и 3-го уровня, отсекая ненужные
$needed = $dbtree->GetCatSegmentation($idsegm);
foreach ($navigation as $key1 => &$l1) {
$level2 = $dbtree->GetSubCats($l1['id_category'], 'all');
foreach ($level2 as $key2 => &$l2) {
$level3 = $dbtree->GetSubCats($l2['id_category'], 'all');
foreach ($level3 as $key3 => &$l3) {
if (!in_array($l3['id_category'], $needed)) {
unset($level3[$key3]);
}
}
if (in_array($l2['id_category'], $needed) || !empty($level3)) {
$l2['subcats'] = $level3;
} else {
unset($level2[$key2]);
}
}
if (in_array($l1['id_category'], $needed) || !empty($level2)) {
$l1['subcats'] = $level2;
} else {
unset($navigation[$key1]);
}
}
return $navigation;
}
