Custom Tags in PHP

Hi Team,
i have a project with many crazy tags. And i want to ignore this tags in the inspector, but i don't know how.
<IR_COMMENT>/* ÄÖÜ : drei deutsche Umlaute in UTF-8 */</IR_COMMENT>

Whats does this Tag?:
The project is a mix with perl and php (please don't say anythink to this fact... it's not my code.... )

<?php

<IR_COMMENT>/* ÄÖÜ : drei deutsche Umlaute in UTF-8 */</IR_COMMENT>

// ??? @TODO Simuliert GET-Eingabe, später löschen
$_GET['aufgabe_id'] = 49;
$_GET['beitrag_id'] = 4;
$_GET['zusage'] = "zusage";

<IR_LOOP LAYOUT="<IR_PREPERL> $global->{'layouts_snippet_global'}->{$sprache_id} </IR_PREPERL>" MAXSHOW="1">
<IR_INCLUDE TYPE="php_require_once" FILE="tp_gera_cc_online_snippet_global.php" />
</IR_LOOP>

?>

Question:

How can i add this tags to validate or ignorelist?
I can't work with many errors ;(
Pls tell me step by step or with a sample file?! I don't  know what i can do.

Thank you very much.