KEX,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<script src="https://code.jquery.com/jquery-1.11.3.min.js">
</script>
<script>
$(function () {
var market = $('.marketPriced');
market.each(function(indx, el){
$('.name > b',el).text() != 'Slovo' && $(el).remove()
});
});
</script>
</head>
<body>
<div class="tradepoll">
<div class="tradecnt">
<form class="left">
<div class="oitm marketPriced">
<div class="oitm">
<div class="name">
<b>Slovo</b>
</div>
</div>
</div>
<div class="oitm marketPriced">
<div class="oitm">
<div class="name">
<b>Knife</b>
</div>
</div>
</div>
<div class="oitm marketPriced">
<div class="oitm">
<div class="name">
<b>Slovo</b>
</div>
</div>
</div>
</form>
</div>
</div>
<div class="tradepoll">
<div class="tradecnt">
<form class="left">
<div class="oitm marketPriced">
<div class="oitm">
<div class="name">
<b>Slovo</b>
</div>
</div>
</div>
<div class="oitm marketPriced">
<div class="oitm">
<div class="name">
<b>Knife</b>
</div>
</div>
</div>
<div class="oitm marketPriced">
<div class="oitm">
<div class="name">
<b>Slovo</b>
</div>
</div>
</div>
</form>
</div>
</div>
</body>
</html>