mxCalendar multi day event trouble

 if(version_compare(PHP_VERSION, '5.3.0') >= 0){
        $diff = $eStart->diff($eEnd);
        $durYear = $diff->format('%y');
        $durMonth = $diff->format('%m');
        $durDay = $diff->format('%d');
        $durHour = $diff->format('%h');
        $durMin = $diff->format('%i');
        $durSec = $diff->format('%s');
    } else {
        $diff = (object)$mxcal->datediff($mxc->get('startdate'),$mxc->get('enddate'),true);
        $durYear = $diff->years;
        $durMonth = $diff->months;
        $durDay = $diff->days;
        $durHour = $diff->hours;
        $durMin = $diff->minutes;
        $durSec = $diff->seconds;
    }
    
    //-- return event duration values 
    $mxcArray['durYear']    = !empty($durYear) ? $durYear : null; 
    $mxcArray['durMonth']    = !empty($durMonth) ? $durMonth : null; 
    $mxcArray['durDay']      = !empty($durDay) ? $durDay : null; 
    $mxcArray['durHour']     = !empty($durHour) ? $durHour : null; 
    $mxcArray['durMin']      = !empty($durMin) ? $durMin : null; 
    $mxcArray['durSec']      = !empty($durSec) ? $durSec : null;
    $mxcArray['mxcmodalClass'] = ($modalView && $ajaxResourceId || isset($_REQUEST['imajax']) ? 'mxcmodal' : '');

    // Add date for each day in a multiple day event ( #127 )
    if($mxcArray['durDay'] !== null && $mxcArray['durDay'] >= 1){
        if($debug) echo 'Multiple Day Event: '.$mxcArray['title'].'<br />';
        for($i = 1; $i<=[i][u][b]$mxcArray['durDay'][/b][/u][/i]; $i++){
            $theSpanDate = strtotime('+'.$i.' day', $mxcArray['startdate']);
            $arrEventDates[$mxcArray['id'].'_'.$i] = array('date'=>$theSpanDate, 'eventId'=>$mxcArray['id'],'repeatId'=>null);
            if($debug) echo '   ++(0)  '.strftime($dateFormat.' '.$timeFormat, $theSpanDate).'<br>';
        }
    }