Nieco taketo?
<html>
<head>
<title>test</title>
<style>
.wrap {
display:flex;
flex-wrap:wrap;
justify-content:space-around;
}
.itm {
width:600px;
height:300px;
background:red;
margin:10px;
}
</style>
</head>...
SELECT replace(joinovany_field,"hladana_vec","nova_vec") FROM ... LEFT JOIN ...