<?//require($_SERVER["DOCUMENT_ROOT"]. "/bitrix/modules/main/include/prolog_before.php");?>
<?
/*
echo "<b>".$reader->nodeType."</b> — nodeType <br/>";
echo "<b>".$reader->localName ."</b> — localName <br/>";
echo "<b>".$reader->name."</b> — name <br/>";
echo "<b>".$reader->namespaceURI."</b> — namespaceURI <br/>";
echo "<b>".$reader->prefix."</b> — prefix <br/>";
echo "<b>".$reader->value."</b> — value <br/>";
echo "<b>".$reader->hasValue."</b> — hasValue <br/>";
echo "<b>".$reader->getAttribute('id')."</b> — getAttribute <br/>";
die();
*/

class BuildTreeSections
{
    private $arCategory = array();
    private $arParentId = array();
    
    public function __construct()
    {
        $this->GetCatFromXML();
        $this->GetArParentId();
    }
    
    private function GetCatFromXML()
    {   
        $reader = new XMLReader();
        $reader->open('lamoda.xml');
        
        while ($reader->read())
        {
            if ($reader->nodeType == XMLReader::ELEMENT && $reader->localName == 'categories')
            {
                while ($reader->read())
                {
                    if ($reader->nodeType == XMLReader::ELEMENT) 
                    {
                        $sectionId = $reader->getAttribute('id');
                        $parentId = $reader->getAttribute('parentId');
                    }
                    elseif($reader->nodeType == XMLReader::TEXT)
                    {
                        $this->arCategory[] = array(
                            'ID' => $sectionId, 
                            'NAME' => $reader->value, 
                            'PARENTID' => $parentId
                        );  
                    }
                    if ($reader->nodeType == XMLReader::END_ELEMENT && $reader->localName == 'categories')
                    {
                       break;
                    }
                }
            }
            if ($reader->nodeType == XMLReader::END_ELEMENT && $reader->localName == 'categories')
            {
                break;
            }
        }  
        $reader->close();
        unset($reader);
    }
    
    public function GetArParentId()
    {
        $count = sizeof($this->arCategory);
        
        if ($count > 0)
        {
            $this->arParentId[0] = $this->arCategory[0];
        }
        
        for ($i = 1; $i < $count; $i++)
        {
            $this->arParentId[$this->arCategory[$i]['PARENTID']][] = array(
                $this->arCategory[$i]['ID'],
                $this->arCategory[$i]['NAME']
            );
        }
        
        //echo "<pre>"; var_dump($this->arParentId); echo "</pre>";
    }
    
    public function GetSubSection($parentId, $level)
    {        
        
        //echo "<pre>"; var_dump($this->arParentId[$parentId]); echo "</pre>";
        
        
        
        if (isset($this->arParentId[$parentId])) 
        {
            foreach ($this->arParentId[$parentId] as $arItem)
            {
                echo "<div style=\"margin-left:" . ($level * 25) . "px;\">" . $arItem[1] . "</div>";
                $level++; //Увеличиваем уровень вложености
                
                    $this->GetSubSection($arItem[0], $level);
                
                $level--; 
                
            }
       
        }
        /*$this->leavel++;
        if (is_array($arCurSecId) && sizeof($arCurSecId) > 0)
        {
            foreach($arCurSecId as $key => $arSection)
            {
                $reader = new XMLReader();
                $reader->open('lamoda.xml');
                
                while ($reader->read())
                {
                    if ($reader->nodeType == XMLReader::ELEMENT && $reader->localName == 'categories')
                    {
                        while ($reader->read())
                        {
                            if($reader->nodeType == XMLReader::TEXT)
                            {
                                $arItem = array(
                                    'SECTION' => array(
                                        'ID' => $sectionId, 
                                        'NAME' => $reader->value, 
                                        'SUBSECTION' => array()
                                        )
                                    );
                                
                                while ($reader->read())
                                {
                                    if ($reader->nodeType == XMLReader::ELEMENT)
                                    {
                                        $subSectionId = $reader->getAttribute('id');
                                        $parentId = $reader->getAttribute('parentId');
                                    }
                                    elseif ($reader->nodeType == XMLReader::TEXT)
                                    {
                                        if ($parentId == $arSection['ID'])
                                        {
                                            $arItem['SECTION']['SUBSECTION'][] = array ('ID' => $subSectionId, 'NAME' => $reader->value, 'SUBSECTION' => array());
                                        }
                                    }
                                }
                                
                            }
                            elseif ($reader->nodeType == XMLReader::END_ELEMENT && $reader->localName == 'category')
                            {
                                break;
                            }
                        }
                    }
                    if ($reader->nodeType == XMLReader::END_ELEMENT && $reader->localName == 'categories')
                    {
                        break;
                    }
                }
                $reader->close();
                unset($reader);
                
                if (is_array($arItem) && size($arItem) > 0)
                {
                    $this->arCurSecId = $arItem;
                }
                
                $this->GetSubSection();
            }
        } 
        else
        {
            
        }*/
    }
};

$section = new BuildTreeSections();

$section->GetSubSection(0, 0);
?>