djonA,
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<head>
<title>Untitled</title>
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<style type="text/css">
.showhide {
background: red;
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var regul= /\D/g;
$('.main').each(function(){
$('.child', this).filter(function() {
return this.textContent.replace(regul,"") - 2 > 0
}).addClass('showhide');
});
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<div class="child"><a href="/">4</a></div>
<div class="child"><a href="/">абв (1)</a></div>
<div class="child"><a href="/">абв (3)</a></div>
<div class="child"><a href="/">абв (2)</a></div>
</div>
</body>
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