<?php
$lista1 = ["CURITIBA","SP","BH","RS"];
$lista2 = ["RJ","SC","AM","CURITIBA"];
$matches = array(); 

for($i=0;$i <= 3; $i++){

    $string = "$lista1[$i]";
    echo "Valor CMDB: $string"."</br>"; 
    $pattern = "/$lista2[$i]/";
    echo "Valor HUB: $pattern"."</br>";
    preg_match($pattern , $string, $matches);

    if(array_key_exists($i, $matches)){
        echo "Match: $matches[$i]"."</br>"."</br>"; 
    }else{
        echo "No Match"."</br>"."</br>"; 
    } 

}
?>