div class="container">
<p class="legend_lookalike">some text</p>
<p>Some more text inside the div - as much as you want...</p>
<p>Maybe some more text...</p>
</div>

CSS:
div.container {
       margin: 20px 0 0 0;
	border: solid 1px #555;
	background-color: #eee;
	width: auto;
	}
div.container p {
	clear: left;
	margin: 6px 3px 6px 10px;
	}

div.container p.legend_lookalike {
	float: left;
	border: solid 1px #555;
	background-color: #fff;
	margin: -0.7em 0 0 10px;
	padding: 0 4px;
	position: relative;
	}

@media all {
*html div.container,*html div.container p.legend_lookalike {
	height: 0;
}

feildset like div

CSS