<form method="POST" id="formguncelle" onsubmit="return false"  onclick="semihburcin();"  >
                            <div class="col-md-12">
                                <input type="text" class="form-control " name="ad" placeholder="Adınız" value="<?php echo $kullanici['ad']; ?>">
                                <br>
                                <input type="text" class="form-control " name="soyad" placeholder="Soyadınız" value="<?php echo $kullanici['soyad']; ?>">
                                <br>
                                <input type="text" class="form-control " name="telefon" placeholder="Telefon Numaranız" value="<?php echo $kullanici['telefon']; ?>">
                                <br>
                                <input type="text" class="form-control " name="email" placeholder="Email Adresiniz" value="<?php echo $kullanici['email']; ?>">
                                <br>
                                <input type="text" class="form-control " name="sifre" placeholder="Şifreniz" value="<?php echo $kullanici['sifre']; ?>">
                                <br>
                                <input type="text" class="form-control " name="il" placeholder="İl" value="<?php echo $kullanici['il']; ?>">
                               <br>
                                <input type="text" class="form-control" name="ilce" placeholder="İlçe" value="<?php echo $kullanici['ilce']; ?>">
                               <br>
                                <input type="text" class="form-control " name="adres" placeholder="Adresiniz" value="<?php echo $kullanici['adres']; ?>">
                               <br>
                               <input type="hidden" name="id" value="<?php echo $_SESSION['kullanici']['id'] ?>">
                                <button class="btn btn-primary btn-lg "><i class="fa fa-edit"></i> Bilgileri Güncelle</button>
                            </div>
                            </form>
böyle denermisin?