Put CRUD Button in last Column - ServerSide Processing

Hi Guys, i have a DataTable works fine with ServerSide Processing. But i wanna add in last Column some buttons like: Remove and Edit buttons. The button is like that: <a href='remove.php?id=X'>Remove</a>

How can i Do it ? Bellow i putted all pages that a used for this.

Javascript Page

$('.listagem_dinamica').dataTable({
        "bJQueryUI": true,
        "bProcessing": true,
        "bServerSide": true,
        "sAjaxSource": "../srvprocess_datatable.php",
        "aoColumns": [
            {"sName": "cod_os"},
            {"sName": "dthora_final"},
            {"sName": "dthr_entrada"},
            {"sName": "dthora_inicio"}
        ]
    });

srvprocess_datatable.php

<?php

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Easy set variables
 */

/* Array of database columns which should be read and sent back to DataTables. Use a space where
 * you want to insert a non-database field (for example a counter or static image)
 */
$columns = $_GET['sColumns'];
$aColumns = explode(',', $columns);

/* Indexed column (used for fast and accurate table cardinality) */
$sIndexColumn = "cod_os";

/* DB table to use */
$sTable = "os";

/* Database connection information */
$gaSql['user'] = "root";
$gaSql['password'] = "123456";
$gaSql['db'] = "sicoti_db";
$gaSql['server'] = "localhost";



/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * If you just want to use the basic configuration for DataTables with PHP server-side, there is
 * no need to edit below this line
 */

/*
 * MySQL connection
 */
$gaSql['link'] = mysql_pconnect($gaSql['server'], $gaSql['user'], $gaSql['password']) or
        die('Could not open connection to server');

mysql_select_db($gaSql['db'], $gaSql['link']) or
        die('Could not select database ' . $gaSql['db']);


/*
 * Paging
 */
$sLimit = "";
if (isset($_GET['iDisplayStart']) && $_GET['iDisplayLength'] != '-1') {
    $sLimit = "LIMIT " . intval($_GET['iDisplayStart']) . ", " .
            intval($_GET['iDisplayLength']);
}


/*
 * Ordering
 */
$sOrder = "";
if (isset($_GET['iSortCol_0'])) {
    $sOrder = "ORDER BY  ";
    for ($i = 0; $i < intval($_GET['iSortingCols']); $i++) {
        if ($_GET['bSortable_' . intval($_GET['iSortCol_' . $i])] == "true") {
            $sOrder .= $aColumns[intval($_GET['iSortCol_' . $i])] . " " .
                    ($_GET['sSortDir_' . $i] === 'asc' ? 'asc' : 'desc') . ", ";
        }
    }

    $sOrder = substr_replace($sOrder, "", -2);
    if ($sOrder == "ORDER BY") {
        $sOrder = "";
    }
}


/*
 * Filtering
 * NOTE this does not match the built-in DataTables filtering which does it
 * word by word on any field. It's possible to do here, but concerned about efficiency
 * on very large tables, and MySQL's regex functionality is very limited
 */
$sWhere = "";
if (isset($_GET['sSearch']) && $_GET['sSearch'] != "") {
    $sWhere = "WHERE (";
    for ($i = 0; $i < count($aColumns); $i++) {
        $sWhere .= $aColumns[$i] . " LIKE '%" . mysql_real_escape_string($_GET['sSearch']) . "%' OR ";
    }
    $sWhere = substr_replace($sWhere, "", -3);
    $sWhere .= ')';
}

/* Individual column filtering */
for ($i = 0; $i < count($aColumns); $i++) {
    if (isset($_GET['bSearchable_' . $i]) && $_GET['bSearchable_' . $i] == "true" && $_GET['sSearch_' . $i] != '') {
        if ($sWhere == "") {
            $sWhere = "WHERE ";
        } else {
            $sWhere .= " AND ";
        }
        $sWhere .= $aColumns[$i] . " LIKE '%" . mysql_real_escape_string($_GET['sSearch_' . $i]) . "%' ";
    }
}


/*
 * SQL queries
 * Get data to display
 */
$sQuery = "
		SELECT SQL_CALC_FOUND_ROWS " . str_replace(" , ", " ", implode(", ", $aColumns)) . "
		FROM   $sTable
		$sWhere
		$sOrder
		$sLimit
		";
$rResult = mysql_query($sQuery, $gaSql['link']) or die(mysql_error());

/* Data set length after filtering */
$sQuery = "
		SELECT FOUND_ROWS()
	";
$rResultFilterTotal = mysql_query($sQuery, $gaSql['link']) or die(mysql_error());
$aResultFilterTotal = mysql_fetch_array($rResultFilterTotal);
$iFilteredTotal = $aResultFilterTotal[0];

/* Total data set length */
$sQuery = "
		SELECT COUNT(" . $sIndexColumn . ")
		FROM   $sTable
	";
$rResultTotal = mysql_query($sQuery, $gaSql['link']) or die(mysql_error());
$aResultTotal = mysql_fetch_array($rResultTotal);
$iTotal = $aResultTotal[0];


/*
 * Output
 */
$output = array(
    "sEcho" => intval($_GET['sEcho']),
    "iTotalRecords" => $iTotal,
    "iTotalDisplayRecords" => $iFilteredTotal,
    "aaData" => array()
);

while ($aRow = mysql_fetch_array($rResult)) {
    $row = array();
    for ($i = 0; $i < count($aColumns); $i++) {
        if ($aColumns[$i] == "version") {
            /* Special output formatting for 'version' column */
            $row[] = ($aRow[$aColumns[$i]] == "0") ? '-' : $aRow[$aColumns[$i]];
        } else if ($aColumns[$i] != ' ') {
            /* General output */
            $row[] = $aRow[$aColumns[$i]];
        }
    }
    $output['aaData'][] = $row;
}

echo json_encode($output);
?>

Page where I wanna show the datatable

<table class="listagem_dinamica">
            <thead>
                <tr>                    
                    <th>OS</th>                       
                    <th>Fim</th>  
                    <th>Entrada</th>
                    <th>Inicio</th>  
                </tr>
            </thead>
            <tbody>
               
                
            </tbody>
        </table>