Codeigniter foreach displaying only one div - php

Question

My table has got 4 categories with unique id. And all I am doing is just querying the database and including a foreach loop which is getting the cateogry ids based on which subcategories are being fetched. Since my table has got 4 categories . So running the loop has to return the div 4 times which I will echo out in the view. That is the concept I had. But it is returning only once. So the div main_div gets printed only for once. I don't understand what is wrong here.
In my Model
public function getSubCategory(){
$sub_div = null;
$query_main_cat = $this->db->query("SELECT * FROM main_category");
foreach($query_main_cat->result_array() as $row){
$mc_id = $row['id'];
$query_get_sub = $this->db->get_where("sub_category", array('main_cat_id' => $mc_id));
foreach ($query_get_sub->result_array() as $row_sub_cat) {
$sub_cat_id = $row_sub_cat['id'];
$sub_cat_name = $row_sub_cat['sub_name'];
$sub_cat_mc_id = $row_sub_cat['main_cat_id'];
$sub_div .= '<div class="col-sm-6 col-md-4">
<div class="table-responsive">
<table class="table table-striped text-center">
<th class="text-center">'.$sub_cat_name.'</th>
<tbody>
<tr><td>Hello</td></tr>
<tr><td>Hello</td></tr>
</tbody>
</table>
</div>
</div>';
}
$main_div = '<div class="tab-pane" id="tab'.$mc_id.'">
'.$sub_div.'
</div>';
return $main_div;
}
}
In my controller
public function load_view(){
$this->load->model("get_category");
$data['sub_category'] = $this->get_category->getSubCategory();
$this->load->view('index', $data);
}
In view
echo $sub_category;
This should return the div main_div 4 times. since I have got 4 rows in my table. But only is showing for once. Need some help here.

Answer 1

You get only once hello, because you prematurely return out of the loop.
return "hello";
You should not use return in the loop, but accumulate the string and return it at the end.
$text = '';
foreach($query_main_cat->result_array() as $row){
$text .= "hello";
}
return $text;