gdrcd_chatcolor_master

function gdrcd_chatcolor_master($str) {
    $search = array(
        '#\<(.+?)\>#is',
        '#\[(.+?)\]#is'
    );
    $replace = array(
        '<span class="c_master_1"><$1></span>',
        '<span class="c_master_2"><$1></span>'
    );
    return preg_replace($search, $replace, $str);
}