Fetch single Data From Database and display in Codeigniter

Question

 I have to fetch single Data From Database and display it in text box in Codeigniter.Please check the code and assist me where am i wrong?

 

 

Controller 

 

public function update_retrive()

{

$id = $this->uri->segment(3);

$this->load->model("model_add_user");

$d=$this->model_add_user->update_retrive($id);

$data['posts'] = $d;

}

Model 

 

public function update_retrive($userId)

{

$this->db->where('userId',$userId);

$this->db->from('add_user');

$q = $this->db->get();

return $q;

}

 

 

View 

 

<div id="btnclick" style="display: none">

<?php

foreach ($posts->result() as $post)

{

?>

<input type="text" name="userId" placeholder="USER ID" style="width:200px" value='<?php echo $post->userId;?>'>&nbsp;

<input type="date" name="date" style="width:200px" value='<?php echo $post->date;?>'>

<input type="text" name="firtsname" placeholder="FIRST NAME" style="width:200px" value='<?php echo $post->firtsname;?>'>&nbsp;

<input type="text" name="middlename" placeholder="MIDDLE NAME" style="width:200px" value='<?php echo $post->middlename;?>'>&nbsp;

<input type="text" name="lastname" placeholder="LAST NAME" style="width:200px" value='<?php echo $post->lastname;?>'>&nbsp;

<input type="text" name="mobileno" placeholder="ENTER MOBILE NO." style="width:200px" value='<?php echo $post->mobileno;?>'>&nbsp;

<input type="text" name="landline" placeholder="LANDLINE No." style="width:410px" value='<?php echo $post->landline;?>'>

<textarea name="address" placeholder="ENTER ADDRESS" style="width:410px" ><?php echo $post->address;?></textarea>

<input type="text" name="city" placeholder="CITY" style="width:200px" value='<?php echo $post->city;?>'>&nbsp;

<input type="text" name="locality" placeholder="LOCALITY" style="width:200px" value='<?php echo $post->locality;?>'>

<input type="text" name="email" placeholder="ENTER EMAIL" style="width:410px" value='<?php echo $post->email;?>'></br>

<input type="submit" class="submit" name="UPDATE" value="UPDATE" >

<input type="submit" class="submit" name="cancel" value="Cancel" >

<?php }

?>

</div>