Codeigniter: Parser issue in a form. Only one is saved - php

Question

I have a strange issue with one form in Codeigniter. I am also using DataMapper PHP. So I have one form with two select statements with a couple of options. If one is selected the other one becomes 0 if the other is selected then the first one becomes 0. Any ideas why the strange behavior ?
Controller
public function edit($id)
{
// Check if the user is logged in
if (!$this->ion_auth->logged_in())
{
redirect('/');
}
elseif ($this->ion_auth->is_admin())
{
// Create Object
$predictions = new Prediction_model();
$predictions->where('id', $id)->get();
$categories = new Categories_model();
$bookmakers = new Bookmakers_model();
$categories->order_by('id', 'asc')->get();
$bookmakers->order_by('id', 'asc')->get();
// Default Object Options
$defaultCategory = new Categories_model();
$defaultCategory->where('id', $predictions->category_id)->get();
$defaultBookmaker = new Bookmakers_model();
$defaultBookmaker->where('id', $predictions->bookmaker_id)->get();
$recent_categories = array();
foreach ($categories as $category)
{
$single_category = array
(
'category_id' => $category->id,
'sport' => $category->sport,
);
array_push($recent_categories, $single_category);
}
$recent_bookmakers = array();
foreach ($bookmakers as $bookmaker)
{
$single_bookmaker = array
(
'bookmaker_id' => $bookmaker->id,
'bookmaker' => $bookmaker->bookmaker,
);
array_push($recent_bookmakers, $single_bookmaker);
}
// Validation rules
$rules = $this->prediction_model->rules;
$this->form_validation->set_rules($rules);
$data = array
(
'prediction_id' => $predictions->id,
'defaultCategory' => $defaultCategory->sport,
'defaultBookmaker' => $defaultBookmaker->bookmaker,
'eventDate' => $predictions->eventDate,
'event' => $predictions->event,
'tip' => $predictions->tip,
'bestOdd' => $predictions->bestOdd,
'bookmakers' => $recent_bookmakers,
'categories' => $recent_categories,
'admin_content' => 'admin/predictions/edit',
);
if ($this->input->post('submit'))
{
$predictions->eventDate = $this->input->post('eventDate');
$predictions->event = $this->input->post('event');
$predictions->tip = $this->input->post('tip');
$predictions->bestOdd = $this->input->post('bestOdd');
$predictions->bookmaker_id = $this->input->post('bookmaker');
$predictions->category_id = $this->input->post('icon');
}
if ($this->form_validation->run() == FALSE)
{
$this->parser->parse('admin/template_admin', $data);
}
else
{
$predictions->save();
redirect('admin/predictions/');
}
}
else
{
// NO ACCESS
}
} // function edit
and here is the VIEW:
<?php echo form_open('admin/predictions/edit/{prediction_id}', 'class="form-horizontal"'); ?>
<div class="form-group">
<label for="category" class="col-sm-2 control-label">Category</label>
<div class="col-sm-10">
<select name="icon" class="form-control">
<option selected='selected'>{defaultCategory}</option>
<option>--------</option>
{categories}
<option value="{category_id}">{sport}</option>
{/categories}
</select>
</div>
</div>
<div class="form-group">
<label for="event" class="col-sm-2 control-label">Event</label>
<div class="col-sm-10">
<input type="text" name="event" class="form-control" value="{event}">
</div>
</div>
<div class="form-group">
<label for="tip" class="col-sm-2 control-label">Tip</label>
<div class="col-sm-10">
<input type="text" name="tip" class="form-control" value="{tip}">
</div>
</div>
<div class="form-group">
<label for="bookmaker" class="col-sm-2 control-label">Bookmaker</label>
<div class="col-sm-5">
<select name="bookmaker" class="form-control">
<option selected='selected'>{defaultBookmaker}</option>
<option>--------</option>
{bookmakers}
<option value="{bookmaker_id}">{bookmaker}</option>
{/bookmakers}
</select>
</div>
<label for="bestOdd" class="col-sm-2 control-label">Odd</label>
<div class="col-sm-3">
<input type="text" name="bestOdd" class="form-control" value="{bestOdd}">
</div>
</div>
<div class="form-group">
<label for="date" class="col-sm-2 control-label">Date</label>
<div class="col-sm-4">
<div class="input-group">
<input size="16" name="eventDate" type="text" class="form-control eventDate" value="{eventDate}" readonly>
<span class="input-group-addon">
<span class="glyphicon glyphicon-calendar"></span>
</span>
</div>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<input type="submit" name="submit" value="Save" class="btn btn-success btn-lg">
</div>
</div>
<?php echo form_close(); ?>