Update some records of table

Hi guys.
I have this form.
Show records, checkbox, code and name, but name can be changed.
I want to change some records but only if it had checked first.

<form name="cambio_nombre" class="" action="index.php?action=subirCargos4" method="POST" enctype="multipart/form-data">
    <table id="miTabla" class="table table-striped table-bordered table-hover table-condensed">
        <tr id="cabecera" class="active">
            <th>Update</th>
            <th>Code</th>
            <th>Name in Master</th>
            <th>New Name</th>
        </tr>
        {section name=i loop=$lista}
        <tr class="success">
            <td><input type="checkbox" name="codigo[]" id="codigo" value="{$lista[i]->codigo}"></td>
            <td>{$lista[i]->codigo}</td>
            <td>{$lista[i]->nombre_old}</td>
            <td><input type="text" name="nombre" id="nombre" value="{$lista[i]->nom_new}"></td>
        </tr>
        {/section}
    </table>

    <div class="modal-footer">
        <button class="btn btn-primary">Procesar</button>
    </div>
</form>

HTML:

For example: First:
chk code name
[ ] 100 paolo
[ ] 200 pedro
[ ] 300 rose
[ ] 400 sean

checked:
chk code name
[x] 100 linda
[ ] 200 pedro
[x] 300 frank
[ ] 400 sean

When I push a button, php file receive an array to update that records.
What need to change in my form to get that?

 

 $codigo = $_POST['codigo'];

Code (markup):

in the php The $indigo will automatically be an array
You can even do it print_r command to check it

 

In the view

<input type="text" name="nombre" id="nombre" value="{$lista[i]->nom_new}">

HTML:

I can to change the NAME.
But

codigo[]

HTML:

pass only the codes.
If I use

nombre[]

HTML:

In php file receive:
codigo[] only codes checked, but nombre[] get all nombres in list. And I need only nombre[] was checked.

 

<td><input type="text" name="nombre" id="nombre" value="{$lista[i]->nom_new}"></td>

Code (markup):

you have nombre as type = "text", it should be "checkbox" right?

 

There are a checkbox, get the code, but I want it gets to get nombre too.