HTML Template - Expression IF/ENDIF vs Google template

[neemias]

I'm trying to use expression IF/ENDIF in HTML template as i did in google docs template... to show only 

pages that column was filled... but when i run the task, the message "Error 1 : '<', hexadecimal value 0x3C, is an invalid attribute character. Line 1, position 1109." is showed. I need a help, please!

Google docs template

<<If: ISNOTBLANK([6.1 Visão panorâmica.])>>

page content

<<EndIf>>

HTML template

<p>&lt;&lt;If:ISNOTBLANK([1])&gt;&gt;</p>

page content

<p>&lt;&lt;EndIf&gt;&gt;</p>