1/ Select the invisible text above (BETWEEN the red parenthesis «( » et «) »)
2/ Copy this selection into the clipboard (contextual option «Copy»)
3/ Quit Safari and come back to your iOS home screen
4/ Go into wiggle mode (long tap any icon)
5/ Open the folder you want to empty the name
6/ Empty the folder name (little cross)
7/ Paste the invisible text of the clipboard (contextual option «Paste»)
8/ Exit wiggle mode (press «Home» button)
Note : you can also use this invisible text to configure a Safari bookmark on your home screen without text.