Filtering by word in Bitrix?

Question

PHP

Made a filter inside Bitrix via $arrFilter

a class="service__link" href="section.php?SECTION_ID=15&CATEGORY=2">

?php $year = intval($_GET["CATEGORY"]); 
if ($year !== 10000000000000000) 
{ 
 $arrFilter=array("PROPERTY"=>array("CATEGORY"=>"$year")); 
} 
?>

I need filtering not by numbers, but by words, for example "vet" "ras"
But if you specify

a class="service__link" href="section.php?SECTION_ID=15&CATEGORY="vet"">

Then the browser does not see the link and, accordingly, filtering does not occur.
How to make sure that the category value is correctly inserted into the link and the php code works as it should?

Answer 1

Aren't you confused by double quotes inside other double quotes? Let's try this:

<a class="service__link" href="section.php?SECTION_ID=15&CATEGORY=vet">

Suddenly it works.