CWiki::RenameLinkOnPages

function RenameLinkOnPages($iBlockId, $oldName, $newName, $iBlockSectId = false)
{
	if(!$iBlockId || !$oldName || !$newName)
		return false;

	$arFilter["IBLOCK_ID"] = $iBlockId;
	$arFilter["CHECK_PERMISSIONS"]="N";

	if($iBlockSectId)
	{
		$arFilter["SECTION_ID"] = $iBlockSectId;
		$arFilter["INCLUDE_SUBSECTIONS"] = "Y";
	}

	$count = 0;
	$sCatName = '';
	$isCategory = CWikiUtils::IsCategoryPage($oldName , $sCatName);

	$catSearch = "[[".GetMessage('CATEGORY_NAME').":".$sCatName."]]";

	$arPatterns = array(
		//link and link_name are equal
		array(
		"search" => "[[".$oldName."|".$oldName."]]",
		"pattern" => "/[[(".preg_quote($oldName).")|(".preg_quote($oldName).")]]/isU".BX_UTF_PCRE_MODIFIER,
		"replacement" => "[[".$newName."|".$newName."]]"
		),

		//link and link_name are different
		array(
		"search" => "[[".$oldName."|",
		"pattern" => "/[[(".preg_quote($oldName).")|(.*)]]/isU".BX_UTF_PCRE_MODIFIER,
		"replacement" => "[[".$newName."|$2]]"
		),

		//exist only link
		array(
		"search" => "[[".$oldName."]]",
		"pattern" => "/[[".preg_quote($oldName)."]]/isU".BX_UTF_PCRE_MODIFIER,
		"replacement" => "[[".$newName."]]"
		)
	);



	$dbRes = CIBlockElement::GetList(array(), $arFilter, false, false, array("ID", "NAME", "DETAIL_TEXT"));

	while($arElement = $dbRes->GetNext())
	{
		$bChanged = false;

		$newText = $arElement["~DETAIL_TEXT"];

		foreach ($arPatterns as $arPattern)
		{
			if(mb_strpos($newText, $arPattern["search"]) !== false)
			{
				$newText = preg_replace($arPattern["pattern"], $arPattern["replacement"], $newText);
				$bChanged = true;
			}
		}


		if ($isCategory)
			if(mb_strpos($newText, $catSearch) !== false)
			{
				$newText = $this->RenameCategoryOnPage($newText, $sCatName, $newName);
				$bChanged = true;
			}

		if($bChanged)
		{
			$this->CleanCache($arElement["ID"], $arElement["NAME"], $iBlockId);
			$this->cIB_E->Update($arElement["ID"], array("DETAIL_TEXT" => $newText), false, true);
			self::MarkPageAsUpdated($iBlockId, $iBlockSectId, $arElement["NAME"]);
			$count++;
		}
	}

	return $count;
}