Producers of the reality show VH1 reality show My Celebrity Dream Wedding fear one of its episodes may turn into a public relations nightmare because one of the blushing bride’s guests is Monster Mom Casey Anthony! Radar has exclusively learned. Fearing a fierce backlash from sponsors, the reality show execs are wrestling with the idea of editing out the notorious Florida mom acquitted of murdering her angelic daughter Caylee, 2, in one of the country’s most high-profile court cases in 2011, a television source tells Radar. Pictures and videos of Anthony posing and partying at the January nupt…