Is <Div> Inside <Label> Block Correct

Is div inside label block correct?

No, HTML does not allow a <label> to contain a <div>.

See the specification for the label element:

Content model:
Phrasing content, but with no descendant labelable elements unless it is the element's labeled control, and no descendant label elements.

Where phrasing content links to:

Phrasing content is the text of the document, as well as elements that mark up that text at the intra-paragraph level. Runs of phrasing content form paragraphs.

a abbr area (if it is a descendant of a map element) audio b bdi bdo br button canvas cite code data datalist del dfn em embed i iframe img input ins kbd keygen label map mark math meter noscript object output progress q ruby s samp script select small span strong sub sup svg textarea time u var video wbr text

Is there any fix for divs inside of label

The valid HTML would be to use a <span> instead of a <div>. Reason is that label represents a text construct and div represents a container object.

Is it correct to use DIV inside FORM?

It is totally fine .

The form will submit only its input type controls ( *also Textarea , Select , etc...).

You have nothing to worry about a div within a form.

html5 div inside label

Set display:block for the label

label {  display:block;}

<label><input type="checkbox" name="ChkBox[]" value="0">Some text goes here</label><label><input type="checkbox" name="ChkBox[]" value="1">Some text goes here</label><label><input type="checkbox" name="ChkBox[]" value="2">Some text goes here</label>

<label for="lastname">Last Name</label>
<input type="text" id="lastname" />