Q:

How to remove group fieldname from Listview WebPart

When using a ListView WebPart on a custom list and enable grouping for a view, the name of the group is always displayed as the first entry

I tried to find a way to get rid of the “Category:” label and found some different hints in the internet, but none really worked.

List View - Group By - without field name

-> no entry with  “xsl:value-of select="$fieldtitle” found in Designer

SharePoint: Removing Group Headings from a View’s Group By

-> in my Custom View named “GroupedView.aspx” there was no “GroupByField” value (even search in notepad after copying the whole xslt from the designer found nothing)
The only thing that worked was a JS script I found on the blogspot from Amit Phule from 2011
Is there really no other way then using an client side script to remove those entries afterwards?
EDIT: Sorry Guys, as my first Screenshot was quite unhelpful, I modified the list a bit. 
I want to get rid of the groupname "Category" over every Group.

A:

Not quite sure you have resolved your problem. Yesterday I was looking for a solution as you asked.  But for now, my problem is resolved by using jQuery. 
Here is the result of my screen short:

I don't have any server client permission. My solution is write jQuery in CEWP.
Here is the code which i made:

Please note: 'Stage' is the field name which we need to replace. 'M1' and 'Start' is the name which we want to present. 
in the screen short, the line of "var i=0" should be "var i=1"

