/**
     * Converts minutes to hours
     * @param type $mins
     * @return string 
     */
    public static function m2h($mins) {
        if ($mins < 0) {
            $min = Abs($mins);
        } else {
            $min = $mins;
        }
        $H = Floor($min / 60);
        $M = ($min - ($H * 60)) / 100;
        $hours = $H + $M;
        if ($mins < 0) {
            $hours = $hours * (-1);
        }
        $expl = explode(".", $hours);
        $H = $expl[0];
        if (empty($expl[1])) {
            $expl[1] = 00;
        }
        $M = $expl[1];
        if (strlen($M) < 2) {
            $M = $M . 0;
        }
        $hours = $H . "." . $M;
        return $hours;
    }