Hide or remove the label of custom field

💬 General Discussion
1

Hi Everyone,
I want to know , how can i hide a label of custom field ;

So to insert another Title of a Tab 3: "COOPERATION COMMECIALE " ,

In EDITVIEW

In DETAILVIEW

i created one HTML FIELD , like below

Now i want to hide the label of this field, in edit and detail views like that :

So how can i proceed ?
Thank u for ur help