Write HTML Code in the Column Title of a view as you can write in the column formula. But the draw back is that you can not write more than 64k, but you can create as many columns as you want and write the code till your code completes
Column Title - 1
<TABLE BORDER=1 cellpadding=0 cellspacing=5 ><TD WIDTH=598>
Column Title - 2
<DIV ALIGN = center><B>List Of Companies</B></TD><TR>
Column Title - 3
<Table Border = 1cellpadding=1 cellspacing=5 width=612 COLOR = #336699>
Column Title - 4
<TD Width = 5><DIV ALIGN = center><B>Srl No</B></DIV></TD>
Column Title - 5
<TD Width = 248><DIV ALIGN = center><B>Company Name</B></DIV></TD></TR></Table>.
The above code generates a table with Srlno, Company as heading for the table then the documents you create will come under the heading.