public static function getIcons($group=null)
	{
		$key = $GLOBALS['BOOTSTRAP']['icons']['active'];

		// load icons if not done so far
		if(!isset($GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['icons']))
		{
			if (TL_MODE == 'BE') {
				if (isset($GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['stylesheet'])) {
					foreach ((array) $GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['stylesheet'] as $stylesheet) {
						$GLOBALS['TL_CSS'][] = $stylesheet;
					}
				}
			}

			$GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['icons'] =
				include TL_ROOT . '/' . $GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['path'];
		}

		// get all icons
		if($group === null)
		{
			return $GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['icons'];
		}

		// get all icons as flat array
		elseif($group === true)
		{
			if(self::$flatIcons === null) {
				$icons = array();

				foreach ($GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['icons'] as $groupIcons)
				{
					$icons = array_merge($icons, $groupIcons);
				}

				self::$flatIcons = $icons;
			}

			return self::$flatIcons;
		}

		return $GLOBALS['BOOTSTRAP']['icons']['sets'][$key]['icons'];
	}