直接在主题函数文件（function.php）下添加如下代码即可：

//Display website on new window when readers click Commenter's name
add_filter( "get_comment_author_link", "pxzoom_modifiy_comment_author_anchor" );
function pxzoom_modifiy_comment_author_anchor( $author_link ){
 return str_replace( "<a", "<a target='_blank'", $author_link );
}