codeignitter, edit user sesuai session login

saya mau tanya, saya mau buat edit data user, datanya tampil, tapi pas diedit datanya nggak masuk, ada yang bisa bantu nggak ya?

<div class="pd-20 bg-white border-radius-4 box-shadow mb-30">
					<form method="post" action="<?php echo base_url().'admin/edit_profile'; ?>">
						<div class="form-group row">
							<label class="col-sm-12 col-md-2 col-form-label weight-600">Nama</label>
							<div class="col-sm-12 col-md-10">
								<input type="hidden" value="<?php echo $user->id_user; ?>" name="id_user">
								<input class="form-control" type="text" name="nama_user" value="<?php echo $user->nama_user; ?>">
							</div>
						</div>
						<div class="form-group row">
							<label class="col-sm-12 col-md-2 col-form-label weight-600">No Telepon</label>
							<div class="col-sm-12 col-md-10">
								<input class="form-control" type="text" name="no_telp" value="<?php echo $user->no_telp; ?>">
							</div>
						</div>
						<div class="form-group row">
							<label class="col-sm-12 col-md-2 col-form-label weight-600">Alamat</label>
							<div class="col-sm-12 col-md-10">
								<input class="form-control" type="text" name="alamat" value="<?php echo $user->alamat; ?>">
							</div>
						</div>
						<div class="form-group row">
							<label class="col-sm-12 col-md-2 col-form-label weight-600">Email</label>
							<div class="col-sm-12 col-md-10">
								<input class="form-control" type="email" name="email" value="<?php echo $user->email; ?>">
							</div>
						</div>

						<div class="form-group row">
						  <label class="col-sm-12 col-md-2 weight-600">Lokasi Kamar</label>
							<div class="col-sm-12 col-md-10">
								<select class="custom-select " name="gender">
									<option <?php if($user->gender == "Perempuan"){echo "selected='selected'";} echo $user->gender; ?> value="Perempuan">Perempuan</option>
									<option <?php if($user->gender == "Laki-laki"){echo "selected='selected'";} echo $user->gender; ?> value="Laki-laki">Laki-laki</option>
								</select>
							</div>
						</div>
						<div class="form-group">
							<input class="btn btn-primary" type="submit" value="UPDATE">
						</div>
					</form>
				</div>

modelini controllernya

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