Getting list of all Manufacturers and corresponding Manufacturer ID

$attribute = Mage::getModel('eav/config')->getAttribute('catalog_product', 'manufacturer');

foreach ( $attribute->getSource()->getAllOptions(true, true) as $option){
     $attributeArray[$option['value']] = $option['label'];
     }  

foreach($attributeArray as $key=>$val){
echo $val;

}