$kacgun = 10;
$tarih = time();
for ($i=1; $i <= $kacgun; $i++) { 
	$tarih = strtotime('1 day', $tarih);
	$day = date("d.m.Y", $tarih);
	// echo $day;
	$gun = date("w", $tarih);
	if ($gun == 0) {
		// Bugün pazar
	}else if ($gun == 6) {
		echo '<option value="'.date("d/m/Y", $tarih).'-14:00">'.date("d/m/Y", $tarih).' 14:00</option>';
	}else{
		echo '<option value="'.date("d/m/Y", $tarih).'-10:00">'.date("d/m/Y", $tarih).' 10:00</option>';
		echo '<option value="'.date("d/m/Y", $tarih).'-13:00">'.date("d/m/Y", $tarih).' 13:00</option>';
		echo '<option value="'.date("d/m/Y", $tarih).'-16:00">'.date("d/m/Y", $tarih).' 16:00</option>';
	}
}

<option value="03/05/2016-10:00">03/05/2016 10:00</option>
<option value="03/05/2016-13:00">03/05/2016 13:00</option>
<option value="03/05/2016-16:00">03/05/2016 16:00</option>
<option value="04/05/2016-10:00">04/05/2016 10:00</option>
<option value="04/05/2016-13:00">04/05/2016 13:00</option>
<option value="04/05/2016-16:00">04/05/2016 16:00</option>
<option value="05/05/2016-10:00">05/05/2016 10:00</option>
<option value="05/05/2016-13:00">05/05/2016 13:00</option>
<option value="05/05/2016-16:00">05/05/2016 16:00</option>
<option value="06/05/2016-10:00">06/05/2016 10:00</option>
<option value="06/05/2016-13:00">06/05/2016 13:00</option>
<option value="06/05/2016-16:00">06/05/2016 16:00</option>
<option value="07/05/2016-14:00">07/05/2016 14:00</option>
<option value="09/05/2016-10:00">09/05/2016 10:00</option>
<option value="09/05/2016-13:00">09/05/2016 13:00</option>
<option value="09/05/2016-16:00">09/05/2016 16:00</option>
<option value="10/05/2016-10:00">10/05/2016 10:00</option>
<option value="10/05/2016-13:00">10/05/2016 13:00</option>
<option value="10/05/2016-16:00">10/05/2016 16:00</option>
<option value="11/05/2016-10:00">11/05/2016 10:00</option>
<option value="11/05/2016-13:00">11/05/2016 13:00</option>
<option value="11/05/2016-16:00">11/05/2016 16:00</option>
<option value="12/05/2016-10:00">12/05/2016 10:00</option>
<option value="12/05/2016-13:00">12/05/2016 13:00</option>
<option value="12/05/2016-16:00">12/05/2016 16:00</option>