AlexOk,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
td :checked + div {
display: block;
}
td div {
display: none;
}
</style>
</head>
<body>
<table>
<tr>
<td> <input type="checkbox" id="c1" name="option1" value="a2">
<div id="1">
<input class="i1" type="text" name="name" />
</div></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
</tr>
</table>
</body>
</html>