Codeigniter: Create a dynamic ID - php

Question

I just want to ask on how can I create a dynamic ID in the fields that I have loaded.
Here is my view:
<div id="content">
<form action="" method="POST">
<div class="modal-body">
<button type="button" class="close" data-dismiss="modal" onclick="location.reload();"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
</div>
<div id="div1">
<fieldset>
<legend><?php // echo $tablename; ?></legend>
<table id="table_main">
<tr>
<th>Column Name:</th>
<th>Type:</th>
<th>Length/Values:</th>
</tr>
<?php foreach($updatemaintenance1 as $field) { ?>
<tr>
<td><input type="text" value="<?php echo $field->name; ?>" style="width: 80%"/></td>
<td>
<select style="width: 80%">
<option><?php echo $field->type; ?></option>
<option>INT</option>
<option>VARCHAR</option>
<option>TEXT</option>
<option>DATE</option>
</select>
</td>
<td><input type="text" value="<?php echo $field->max_length; ?>" style="width: 100%"/></td>
</tr>
<?php } ?>
<tr>
<?php //foreach ($tablename as $row1) { ?>
<td><input type="text" id="ninja79" name="ninja79" value="<?php echo $table_name1; ?>"/></td>
<?php// } ?>
</tr>
</table>
<div class="modal-footer">
<button type="button" class="btn_editinventorytype btn-info btn-sm">Update</button>
<button type="button" class="btn_deleteinventorytype btn-danger btn-sm">Delete</button>
</div>
</fieldset>
</div>
</form>
</div>
As you can see I have a foreach loop where I placed all the values from my database. What I want is to generate an ID on the textboxes and the selectbox. And I have this code in the model where I can modify the loaded fields.
Here is my model:
public function modify_table($modify){
$fields = array($modify[''] = array('name' => $modify[''],
'type' => $modify[''],
'constraint' => $modify['']),
);
$this->dbforge->modify_column($modify['ninja79'], $fields);
}
This codes are not as simple as 'SELECT * FROM 'tablename' I mean I'm talking about modifying tables in the database, so please could you help me? All I want is to have a dynamic ID in my model and in my view. I have no idea on how to code that. This is confusing so PLEASE I need your help. Thank you in advance!