comment-template.php olması lazım wp-includes klasöründe. Her şey onun içinde orada function get_comment_author_link( $comment_ID = 0 ) {
/** @todo Only call these functions when they are needed. Include in if... else blocks */
$url = get_comment_author_url( $comment_ID );
$author = get_comment_author( $comment_ID );

if ( empty( $url ) || 'http://' == $url )
$return = $author;
else
$return = "$author";
return apply_filters('get_comment_author_link', $return);
}

yer alıyor. Onu şöyle değiştir.
function get_comment_author_link( $comment_ID = 0 ) {
/** @todo Only call these functions when they are needed. Include in if... else blocks */
$url = get_comment_author_url( $comment_ID );
$author = get_comment_author( $comment_ID );

if ( empty( $url ) || 'http://' == $url )
$return = $author;
else
$return = "$author";
return apply_filters('get_comment_author_link', $return);
}