$str1 = "/faqs/broker-type";
    $str2 = "aaa <a href='/faqs/broker-type'>text</a>";
    $str3 = 'aaa <a href="/faqs/broker-type">text</a>';

    $patterns = [
        '/faqs/'
    ];

    $replacements = array();


    echo preg_replace($patterns, $replacements, $str1);

$str1 = "/faqs";
    $str2 = "aaa <a href='/faqs'>text</a>";
    $str3 = 'aaa <a href="/faqs">text</a>';

<?php
$array = [
    '/faqs/broker-type',
    "aaa <a href='/faqs/broker-type'>text</a>",
    'aaa <a href="/faqs/broker-type">text</a>',
];
foreach ($array as $key => $value) {
    $res = null;
    preg_match("/(.*/faqs/).*K(['"].*)|(.*/faqs/)/", $value, $res);
    var_dump($res);
}

<?php
 $text="xyz /faqs/broker-type/abc/a.html  not_replace
        aaa <a href='/faqs/broker-type/'>text</a>
        aaa <a href="/faqs/broker-type">text</a> /faqs/abcdef/xyz.php";
 print preg_replace('#/faqs/K.*?([s'"]|$)#','$1',$text);

 Результат:

 xyz /faqs/  not_replace
 aaa <a href='/faqs/'>text</a>
 aaa <a href="/faqs/">text</a> /faqs/
?>