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HTML 4 and 5 Voce can use <legend>
:
<form>
<fieldset>
<legend>Exemplo:</legend>
<input type="radio" id="A" name="rdo">
<label for="A">A</label><br/>
<input type="radio" id="B" name="rdo">
<label for="B">B</label><br/>
</fieldset>
</form>
otherwise Voce can use in this way:
.fieldset-border {
border: 1px groove #ddd !important;
padding: 0 1.4em 1.4em 1.4em !important;
margin: 0 0 1.5em 0 !important;
-webkit-box-shadow: 0px 0px 0px 0px #000;
box-shadow: 0px 0px 0px 0px #000;
}
.fieldset-border .legend-border {
font-size: 1.2em !important;
text-align: left !important;
width: auto;
padding: 0 10px;
border-bottom: none;
}
<fieldset class="fieldset-border">
<legend class="legend-border">Teste</legend>
</fieldset>
I think this link solves your question https://answall.com/questions/213100/coloca-texto-na-borda-div
– Renato Neri Júnior
was worth my cheated
– Gabriel