Excel::load('excelrecap.xls', function($excel) use($array) {

        $excel->sheet('Copro', function($sheet) use($array) {

            $sheet->fromArray($array, null, 'A9', false);
            foreach ($sheet as $row) {
                $sheet->setCellValue($row, 'some value');
            }
        });

    })->export('xls');

array:2 [
  0 => array:8 [
    "Batiment" => "Unique"
    "N° du lot" => 7
    "Étage" => "1e étage"
    "Fraction" => "Parking 0.35"
    "Surface" => "11.500"
    "Coefficient" => "0.350"
    "Surface pondérée" => "4.025"
    "Quote-part" => "635.961"
  ]
  1 => array:8 [
    "Batiment" => "Unique"
    "N° du lot" => 8
    "Étage" => "1e étage"
    "Fraction" => "Principal"
    "Surface" => "65.850"
    "Coefficient" => "0.903"
    "Surface pondérée" => "59.265"
    "Quote-part" => "9364.039"
  ]
]

$objPHPExcel->getActiveSheet()->mergeCells('A1:E1');

// add some text
$objPHPExcel->getActiveSheet()->setCellValue('A1','The quick brown fox.');

$objPHPExcel->getActiveSheet()->mergeCells('A1:E3');

// add some text
$objPHPExcel->getActiveSheet()->setCellValue('A1','The quick brown fox.');

$sheet->cells('A1:C1', function($cells) {
    $cells->setBorder('thin', 'thin', 'thin', 'thin');
});
$sheet->mergeCells('A1:C1');