simple(?) theme modification

[crazydog_mybb1.2_import10108]

How could I make it so that links in post are bold, but links elsewhere are not

[zaher1988]

Hello there

open ./inc/class_parser.php

find

$link = "<a href=\"$fullurl\" target=\"_blank\">$name</a>";

replace with

$link = "<a href=\"$fullurl\" target=\"_blank\"><strong>$name</strong></a>";